| 释义 |
tract
tractpamphlet or leaflet; an extended area of land: a housing tract
Not to be confused with:tracked – followed the traces of; made tracks upon: The children tracked mud into the house.tract 1 T0302000 (trăkt)n.1. a. An expanse of land or water.b. A specified or limited area of land: developing a 30-acre tract.2. Anatomy a. A system of organs and tissues that together perform a specialized function: the alimentary tract.b. A bundle of nerve fibers having a common origin, termination, and function.3. Archaic A stretch or lapse of time.
[Middle English, period of time, from Latin tractus, course, space, period of time, from past participle of trahere, to draw.]
tract 2 T0302000 (trăkt)n. A leaflet or pamphlet containing a declaration or appeal, especially one put out by a religious or political group.
[Middle English tracte, treatise, probably short for Latin tractātus, from past participle of tractāre, to discuss, frequentative of trahere, to draw.]
tract 3 T0302000 (trăkt)n. The verses from Scripture sung after the gradual in the Roman Catholic Mass during penitential seasons such as Lent or as part of a Requiem.
[Middle English tracte, from Medieval Latin tractus, from Latin, a drawing out (from its being an uninterrupted solo); see tract1.]tract (trækt) n1. an extended area, as of land2. (Anatomy) anatomy a system of organs, glands, or other tissues that has a particular function: the digestive tract. 3. (Anatomy) a bundle of nerve fibres having the same function, origin, and termination: the optic tract. 4. archaic an extended period of time[C15: from Latin tractus a stretching out, from trahere to drag]
tract (trækt) n (Journalism & Publishing) a treatise or pamphlet, esp a religious or moralistic one[C15: from Latin tractātus tractate]
tract (trækt) n (Roman Catholic Church) RC Church an anthem in some Masses[C14: from Medieval Latin tractus cantus extended song; see tract1]tract1 (trækt)
n. 1. an expanse or area of land, water, etc.; region; stretch. 2. a. a definite region or area of the body, esp. a system of elongated parts or organs: the digestive tract. b. a bundle of nerve fibers having a common origin and destination. 3. a stretch or period of time; interval; lapse. 4. a Roman Catholic penitential anthem consisting of scriptural verses, sung after the gradual, esp. before Easter. [1350–1400; < Latin tractus stretch (of space or time), a drawing out, derivative of trahere to draw] tract2 (trækt)
n. a brief treatise or pamphlet for general distribution, usu. on a religious or political topic. [1400–50; late Middle English tracte, appar. shortening of Medieval Latin tractātus tractate] tract (trăkt) A system of body organs and connected parts that work together to perform a specialized function, such as digestion.Thesaurus| Noun | 1. |  tract - an extended area of land parcel of land, piece of ground, piece of land, parcelbaseball diamond, infield, diamond - the area of a baseball field that is enclosed by 3 bases and home platecenter field, centerfield, center - the piece of ground in the outfield directly ahead of the catcher; "he hit the ball to deep center"left field, leftfield, left - the piece of ground in the outfield on the catcher's left; "the batter flied out to left"outfield - the area of a baseball playing field beyond the lines connecting the basesright field, rightfield, right - the piece of ground in the outfield on the catcher's rightshort - the location on a baseball field where the shortstop is stationedrailway yard, railyard, yard - an area having a network of railway tracks and sidings for storage and maintenance of cars and enginesdesert - arid land with little or no vegetationoasis - a fertile tract in a desert (where the water table approaches the surface)battlefield, battleground, field of battle, field of honor, field - a region where a battle is being (or has been) fought; "they made a tour of Civil War battlefields"minefield - a region in which explosives mines have been placedbreeding ground - a place where animals breedclearing, glade - a tract of land with few or no trees in the middle of a wooded areafield - a piece of land cleared of trees and usually enclosed; "he planted a field of wheat"field of fire - the area that a weapon or group of weapons can cover effectively with gun fire from a given positiongrounds - a tract of land cleared for some special purposes (recreation or burial etc.)athletic field, playing area, playing field, field - a piece of land prepared for playing a game; "the home crowd cheered when Princeton took the field"geographic area, geographic region, geographical area, geographical region - a demarcated area of the Earthindustrial park - a tract of land at a distance from city center that is designed for a cluster of businesses and factoriesgrassland - land where grass or grasslike vegetation grows and is the dominant form of plant lifemud flat - a tract of low muddy land near an estuary; covered at high tide and exposed at low tideparade ground - an area for holding paradesfairground - an open area for holding fairs or exhibitions or circusesmidway - the place at a fair or carnival where sideshows and similar amusements are locatedfairway - a tract of ground free of obstacles to movementpark, parkland - a large area of land preserved in its natural state as public property; "there are laws that protect the wildlife in this park"common, commons, green, park - a piece of open land for recreational use in an urban area; "they went for a walk in the park"picnic area, picnic ground - a tract of land set aside for picnickingpublic square, square - an open area at the meeting of two or more streetstoll plaza - an area where tollbooths are locatedrange - a large tract of grassy open land on which livestock can graze; "they used to drive the cattle across the open range every spring"; "he dreamed of a home on the range"sector - a portion of a military positionland site, site - the piece of land on which something is located (or is to be located); "a good site for the school"subdivision - an area composed of subdivided lotsmine field - a tract of land containing explosive minesterrain - a piece of ground having specific characteristics or military potential; "they decided to attack across the rocky terrain"plot of ground, plot of land, patch, plot - a small area of ground covered by specific vegetation; "a bean plot"; "a cabbage patch"; "a briar patch"lot - a parcel of land having fixed boundaries; "he bought a lot on the lake"yard - a tract of land enclosed for particular activities (sometimes paved and usually associated with buildings); "they opened a repair yard on the edge of town"yard - a tract of land where logs are accumulated | | 2. |  tract - a system of body parts that together serve some particular purposesystem - a group of physiologically or anatomically related organs or parts; "the body has a system of organs for digestion"respiratory tract, airway - the passages through which air enters and leaves the bodyurinary tract - the organs and tubes involved in the production and excretion of urine | | 3. |  tract - a brief treatise on a subject of interest; published in the form of a bookletpamphlettreatise - a formal exposition | | 4. |  tract - a bundle of myelinated nerve fibers following a path through the brainnerve pathway, nerve tract, pathwayoptic radiation, radiatio optica - a nerve pathway from the lateral geniculate body to the visual cortexcommissure - a bundle of nerve fibers passing from one side to the other of the brain or spinal cordcerebral peduncle, peduncle - a bundle of myelinated neurons joining different parts of the brainsubstantia alba, white matter - whitish nervous tissue of the CNS consisting of neurons and their myelin sheaths |
tract1noun area, lot, region, estate, district, stretch, quarter, territory, extent, zone, plot, expanse A vast tract of land is ready for development.
tract2noun treatise, essay, leaflet, brochure, booklet, pamphlet, dissertation, monograph, homily, disquisition, tractate She produced a feminist tract, 'Comments on Birth Control'.tractnoun1. A part of the earth's surface:area, belt, district, locality, neighborhood, quarter, region, zone.Informal: neck of the woods.2. A piece of land:lot, parcel, plot.Translationstract (trӕkt) noun1. a piece of land. 一片土地 一片土地2. a system formed by connected parts of the body. the digestive tract. (動物身體有關器官的)系統 （动物身体有关器官的）系统 3. a short essay or booklet. 短文，小冊子 短文，小册子 tract
tract11. Anatomy a system of organs, glands, or other tissues that has a particular function 2. a bundle of nerve fibres having the same function, origin, and termination
tract2 RC Church an anthem in some Masses Tract in the central nervous system, any one of several groups of closely placed nerve fibers having a common morphological structure and common functions. Tracts are divided by function into associative tracts, which unite various sections of the cerebral cortex in the same hemisphere; commisural tracts, which connect both hemispheres and ensure their cooperative activity; and projection tracts, which unite the cerebral cortex with lower brain formations and, through them, with the periphery. tract
tract [trakt] a longitudinal assemblage of tissues or organs, especially a number of anatomic structures arranged in series and serving a common function, such as the gastrointestinal or urinary tract; also used in reference to a bundle (or fasciculus) of nerve fibers having a common origin, function, and termination within the central nervous system.alimentary tract alimentary canal" >alimentary canal.biliary tract the organs, ducts, and other structures that participate in secretion (the liver), storage (the gallbladder), and delivery (hepatic and bile ducts) of bile into the duodenum. See illustration. Anatomy of the gallbladder and biliary tract. From Aspinall and Taylor-Robinson, 2002.corticospinal t's two groups of nerve fibers (the anterior and lateral corticospinal tracts) that originate in the cerebral cortex and run through the spinal cord.digestive tract alimentary canal" >alimentary canal.dorsolateral tract a group of nerve fibers in the lateral funiculus of the spinal cord dorsal to the posterior column.extrapyramidal tract extrapyramidal system.gastrointestinal tract the stomach and intestine in continuity; see also digestive system.iliotibial tract a thickened longitudinal band of fascia lata extending from the tensor muscle downward to the lateral condyle of the tibia.intestinal tract see intestinal tract.optic tract the nerve tract proceeding backward from the optic chiasm, around the cerebral peduncle, and dividing into a lateral and medial root, which end in the superior colliculus and lateral geniculate body, respectively.pyramidal t's collections of motor nerve fibers arising in the brain and passing down through the spinal cord to motor cells in the anterior horns.respiratory tract system" >respiratory system.urinary tract the organs and passageways concerned in the production and excretion of urine from the kidneys to the meatus" >urinary meatus; see also system" >urinary system.uveal tract the vascular tunic of the eye, comprising the choroid, ciliary body, and iris.tract (trakt), [TA] Do not confuse this word with track.1. An elongated area; a passage or pathway.
See also: fascicle. Synonym(s): tractus [TA]2. An abnormal passage (for example, a fistula or sinus communicating with an abscess cavity). [L. tractus, a drawing out] tract (trăkt)n. Anatomy a. A system of organs and tissues that together perform a specialized function: the alimentary tract.b. A bundle of nerve fibers having a common origin, termination, and function.tract Anatomy 1. A bundle of nerve fibers in the CNS. See Spinothalamic tract.2. A tube through which a substance or gas flows. See Aerodigestive tract, Biliary tract, Gastrointestinal tract, Olfactory tract, Respiratory tract, Serpiginous tract, Urogenital.tract (trakt) [TA] An elongated area, e.g., path, track, way.
See also: fascicle
Synonym(s): tractus. [L. tractus, a drawing out]tract (trakt) [L. tractus, extent] 1. A pathway, course, or channel.2. A bundle of parallel axons in the central nervous system (CNS) that runs along a stereotyped course from a common originating area to a common termination area. 3. A group of organs or parts that form a continuous pathway.aerodigestive tractThe anatomic region in the oral cavity and throat through which both air and food pass.afferent tractAny axon tract that carries information toward a particular target area. alimentary tractDigestive tract.anterior spinocerebellar tractVentral spinocerebellar tract.ascending tractAn axon tract running rostrally in the spinal cord or brain, often a sensory pathway. BILIARY TRACT (IN RELATION TO LIVER, PANCREAS, AND DUODENUM)biliary tractThe organs and ducts through which bile travels on its way to the duodenum. These are the bile canaliculi, right and left hepatic ducts, common hepatic duct, gallbladder, cystic duct, bile duct, and hepatopancreatic ampulla. See: illustration; bile ducts; gallbladder; liverBurdach tract See: Burdach, Karlcentral tegmental tract An axon tract connecting the subthalamus and the midbrain reticular formation with the inferior olivary nucleus.corticobulbar tractAn axon tract from the motor cortex that innervates the reticular formation and the cranial nerve nuclei in the hindbrain.corticohypothalamictractAn axon tract from the frontal, parietal, and occipital cortices that innervates the hypothalamus.corticospinal tractAn axon tract from the motor cortex that travels into the spinal cord, synapsing at all levels. Axons of the corticospinal tract first converge into a bundle in the posterior limb of the internal capsule and continue as a compact bundle through the cerebral peduncle. In the pons, the corticospinal tract separates into several bundles that converge more caudally in the hindbrain as the pyramid. In the caudal hindbrain, the corticospinal tract crosses the midline in the pyramidal decussation and continues down the spinal cord as the lateral corticospinal tract. cuneocerebellar tractAn axon tract originating in the external cuneate nucleus and synapsing in the ipsilateral cerebellum.descending tractAny axon tract running caudally in the spinal cord or brain, often a motor pathway.digestive tractThe continuous set of tubes that move food from the mouth to the anus. Synonym: alimentary tractdirect cerebellar tractDorsal spinocerebellar tract.dorsal spinocerebellar tract An ipsilateral (uncrossed) axon tract originating throughout Clarke's column in the spinal cord. The tract runs in the lateral funiculus of the spinal cord and terminates in the ipsilateral vermis of the cerebellum. Synonym: direct cerebellar tractdorsolateral tractLissauer's tract.efferent tractAny axon tract that carries information away from a particular target area.extrapyramidal tractAny of the axon tracts of the extrapyramidal system. See: extrapyramidal systemfrontopontine tractA tract that passes from the cerebral cortex of the frontal lobe through the internal capsule and cerebral peduncle to the pons. Synonym: Arnold's bundlegastrointestinal tractThe esophagus, stomach, and intestines.geniculohypothalamic tract An axon tract originating in the lateral geniculate nucleus of the thalamus and innervating the suprachiasmatic nuclei of the hypothalamus. The suprachiasmatic nuclei contain pacemakers of the circadian rhythm system, and the geniculohypothalamic tract provides visual input that helps to entrain the pacemaker cells. genital tract In males, the channels by which spermatozoa leave the body. In females, the channels in which the ovum grows and is fertilized and through which the baby leaves the body. Synonym: reproductive tractgenitourinary tractThe genital and urinary tracts together. Synonym: urogenital tracthabenulo-interpeduncular tractFasciculus retroflexus.iliotibial tractA thickened band in the deep fascia along the lateral thigh (i.e., the fascia lata) that extends from the tubercle of the iliac crest to the lateral condyle of the tibia. The iliotibial tract is an aponeurosis shared by both the gluteus maximus and tensor fasciae lata muscles, both of which insert into it. internodal tractIn the heart, myocardial tissue in the right atrium that preferentially carries sinoatrial impulses to the left atrium, to the intra-atrial septum, or to the atrioventricular node.intestinal tractThe small and large intestines.Lissauer's tract See: Lissauer's tractlower gastrointestinal tractThe anus, rectum, colon, cecum, ileum and jejunum.mammillotegmental tractAn axon tract originating in the mammillary body and synapsing in small nuclei near the caudal end of the midbrain tegmentum.mammillothalamic tractAn axon tract originating in the mammillary body and synapsing in the anterior nucleus of the thalamus. The mammillothalamic tract is an integral component of the loop of neural circuits called the limbic system. medullary reticulospinal tract See: reticulospinal tractmesencephalic tract of the trigeminal nerveAn axon tract of the unipolar sensory neurons of the trigeminal mesencephalic nucleus. Peripheral processes of these neurons run in the mesencephalic tract to reach the mandibular nerve (CN V3) and carry proprioceptive information from the face and the teeth. Axons of these neurons run in the mesencephalic tract and innervate a number of central nuclei, including the trigeminal motor nucleus. Synonym: trigeminal mesencephalic tractmotor tractAny axon tract, usually running caudally in the CNS, that transmits output information.olfactory tractA white ribbon-like band along the bottom (orbital) surface of each frontal lobe, composed of axons from the mitral cells in olfactory bulb. These axons terminate in the piriform cortex (the primary olfactory cortex) at the base of the cerebral hemisphere. olivocerebellar tract An axon tract running transversely (as opposed to longitudinally) in the hindbrain from the inferior olivary nucleus to all parts of the cerebellum via the inferior cerebellar peduncle.optic tractThe main bundle of axons from the optic nerves caudal to the optic chiasm. Axons from the temporal half of the retina continue in the ipsilateral optic tract; axons from the nasal half of the retina cross the midline of the brain in the optic chiasm and join the contralateral optic tract. Most optic tract axons synapse in the lateral geniculate nucleus of the thalamus; most of the remaining optic tract axons synapse in the superior colliculus (optic tectum) of the midbrain. pontine reticulospinal tract See: reticulospinal tractpyramidal tractThe corticobulbar and corticospinal tracts, which are the major direct outputs of the motor cortex. In cross-sections of the hindbrain, the pyramidal tract has a triangular shape. reproductive tractGenital tract.respiratory tractThe respiratory channel from mouth and nose to the alveoli in the lungs.reticulospinal tractEither of two tracts:the pontine reticulospinal tract or the medullary reticulospinal tract. The pontine reticulospinal tract contains axons originating in the pontine reticular formation; the axons run into the spinal cord along the ventral midline (the medial part of the anterior funiculus). The medullary reticulospinal tract contains axons originating in the medial two thirds of the hindbrain reticular formation; these axons run into the spinal cord in the anterior part of the lateral funiculus. retinohypothalamic tractThe retinal ganglion cell axons from the optic nerves that leave the optic tract at the optic chiasm to innervate the suprachiasmatic nucleus (in the hypothalamus), which contains the pacemaker cells for circadian rhythms.rubrospinal tractAn axon tract originating in the red nucleus of the midbrain. After leaving the red nucleus, axons cross to the contralateral side and descend into the spinal cord, where they terminate in the ventral horns. The red nucleus is innervated by axons from the motor cortices and the cerebellum, and the rubrospinal pathway is an extrapyramidal route to the spinal cord. A major function of rubrospinal axons is to set and adjust the muscle tone in the flexor muscles. sensory tractAny axon tract, usually traveling rostrally in the CNS, that transmits information related to somatic or visceral sensation. solitary tract Tractus solitarius.spinal tract of the trigeminal nerveA tract of somatic sensory axons from the trigeminal nerve that runs caudally from the midpontine level of the brainstem along the spinal nucleus of the trigeminal nerve. The tract carries pain and temperature information from the face, and its axons synapse topographically in the adjacent nucleus. In the transition zone between hindbrain and spinal cord, the spinal tract of the trigeminal nerve disappears into the tract of Lissauer although a few axons of the spinal tract extend as far caudally as spinal cord segment C3-C4. Synonym: trigeminal spinal tractspinocerebellartractThe dorsal or the ventral spinocerebellar tract.spinothalamic tractThe lateral or the anterior spinothalamic tract. Both tracts are bundles of axons running rostrally in the ventrolateral quadrant (the ventral half of the lateral funiculus) of the spinal cord, originating from contralateral dorsal horn neurons, and synapsing in the ventral posterolateral (VPL) nucleus of the thalamus. The lateral spinothalamic tract carries pain and temperature information from the body; the anterior spinothalamic tract (adjacent and dorsal to the lateral tract) carries light touch information. supraopticohypophyseal tract, supraopticohypophyial tractA tract of fibers arising from cell bodies located in supraoptic and paraventricular nuclei of the hypothalamus and terminating in the posterior lobe of the hypophysis.trigeminal mesencephalic tractMesencephalic tract of the trigeminal nerve.trigeminal spinal tractSpinal tract of the trigeminal nerve.trigeminothalamic tractTrigeminal lemniscus.upper gastrointestinal tractThe esophagus, stomach, and duodenum.urinary tractThe channel followed by urine in the body, from the glomeruli in the kidneys through the ureters, bladder, and urethra.urogenital tractGenitourinary tract.uveal tractThe vascular and pigmented tissues that constitute the middle layer of the wall of the eye. The tract comprises the iris, ciliary body, and choroid. Synonym: vascular tunic of the eyeventral spinocerebellar tractAn axon tract originating in the contralateral dorsal and intermediate horns of the lower spinal cord, from the coccygeal through the lumbar segments. This tract runs in the lateral funiculus of the spinal cord, recrosses the midline, and terminates in the ipsilateral vermis of the cerebellum. Synonym: anterior spinocerebellar tractventricular outflow tractIn the heart, the pathway through which blood is normally ejected from the ventricle. For the left ventricle, it includes the walls of the ventricle, the anterior leaflet of the mitral valve, the aortic valve, the ascending aorta, and the arch of the aorta. For the right ventricle, it includes the walls of the ventricle, the pulmonic valve, the pulmonary trunk, and the pulmonary arteries. vestibulospinal tractAn axon tract that conveys balance and equilibrium information to the spinal cord from the vestibular nuclei in the brainstem. The medial vestibulospinal tract is the continuation of the medial longitudinal fasciculus (MLF) caudally into the spinal cord below the cervical levels; it runs along the medial margin of the ventral quadrant of the cord. The lateral vestibulospinal tract runs caudally in an anterior band in the ventral and ventrolateral quadrant of the spinal cord. vocal tractThe tissues and organs that produce human vocalizations, including lips, tongue, mouth, nasal cavities, pharynx, and larynx.tract 1. An associated group of organs forming a pathway along which liquids, solids or gases are moved. Examples are the digestive tract, the urinary tract and the respiratory tract. 2. A bundle of myelinated nerve fibres with a common function. tract a bundle of nerve fibres that may run within the CENTRAL NERVOUS SYSTEM or to the peripheral nervous system.tract 1. A bundle of nerve fibres (e.g. the optic tracts). 2. A system of organs serving the same function, e.g. the respiratory tract.
geniculocalcarine tract See optic radiations.
optic tract's Two cylindrical bands of nerve fibres carrying visual impulses. They run outward and backward from the posterolateral angle of the optic chiasma, then sweep laterally, encircling the hypothalamus posteriorly on their way to the lateral geniculate bodies. A few fibres end in the superior colliculi. See incongruous hemianopia; visual pathway.tract (trakt) [TA] 1. Elongated area; passage or pathway. 2. Abnormal passage (e.g., a fistula or sinus communicating with an abscess cavity). [L. tractus, a drawing out]Patient discussion about tractQ. While in a conversation with anyone they have about a minute before I loose tract and intrest, Is this ADHD I always feel like I have to go full speed 24/7 and can never relax, sounds strange I know but it seems to be catching up with me.A. not necessarily...i see that you are 31. those symptoms are new? if so- thee are other conditions that might cause them. hyperthyroid can get you in that state too. so it might be a good idea to go and get checked up. Q. How to prevent getting a bladder infection? I am worried about getting another bladder infection like I just had now. I am during my second trimester. How can I avoid getting it again?A. drink more cranberry juice,its 100% natural, and wont harm the baby in anyway. More discussions about tracttract
tractA parcel of real estate; usually refers to a large area of land. TRACT
| Acronym | Definition |
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| TRACT➣Transport of Air Pollutants over Complex Terrain (experiment) | | TRACT➣Transportable Remote Area Communication Terminal |
tract
Related to tract: tract houseSynonyms for tractnoun areaSynonyms- area
- lot
- region
- estate
- district
- stretch
- quarter
- territory
- extent
- zone
- plot
- expanse
noun treatiseSynonyms- treatise
- essay
- leaflet
- brochure
- booklet
- pamphlet
- dissertation
- monograph
- homily
- disquisition
- tractate
Synonyms for tractnoun a part of the earth's surfaceSynonyms- area
- belt
- district
- locality
- neighborhood
- quarter
- region
- zone
- neck of the woods
noun a piece of landSynonymsSynonyms for tractnoun an extended area of landSynonyms- parcel of land
- piece of ground
- piece of land
- parcel
Related Words- baseball diamond
- infield
- diamond
- center field
- centerfield
- center
- left field
- leftfield
- left
- outfield
- right field
- rightfield
- right
- short
- railway yard
- railyard
- yard
- desert
- oasis
- battlefield
- battleground
- field of battle
- field of honor
- field
- minefield
- breeding ground
- clearing
- glade
- field of fire
- grounds
- athletic field
- playing area
- playing field
- geographic area
- geographic region
- geographical area
- geographical region
- industrial park
- grassland
- mud flat
- parade ground
- fairground
- midway
- fairway
- park
- parkland
- common
- commons
- green
- picnic area
- picnic ground
- public square
- square
- toll plaza
- range
- sector
- land site
- site
- subdivision
- mine field
- terrain
- plot of ground
- plot of land
- patch
- plot
- lot
noun a system of body parts that together serve some particular purposeRelated Words- system
- respiratory tract
- airway
- urinary tract
noun a brief treatise on a subject of interestSynonymsRelated Wordsnoun a bundle of myelinated nerve fibers following a path through the brainSynonyms- nerve pathway
- nerve tract
- pathway
Related Words- optic radiation
- radiatio optica
- commissure
- cerebral peduncle
- peduncle
- substantia alba
- white matter
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