| 释义 |
valve
 valvetop: closed check valvebottom: open check valvevalve V0016800 (vălv)n.1. a. Any of various devices that regulate the flow of gases, liquids, or loose materials through piping or through apertures by opening, closing, or obstructing ports or passageways.b. The movable control element of such a device.c. A device in a brass wind instrument that can be opened or closed to change the pitch by altering the length of the air column in the tube.2. Anatomy A membranous structure in a hollow organ or passage, as in an artery or vein, that folds or closes to prevent the return flow of the body fluid passing through it.3. Biology a. A piece of shell covering or enclosing certain mollusks or other invertebrates, especially the single one of a univalve mollusk or one of the paired hinged ones of a bivalve mollusk or brachiopod.b. One of the two siliceous halves of the cell wall of a diatom.4. One of the pieces into which a plant part splits at maturity, especially a segment of a fruit capsule or of certain anthers.5. Chiefly British An electron tube or a vacuum tube.6. Archaic Either half of a double or folding door.tr.v. valved, valv·ing, valves 1. To provide with a valve.2. To control by means of a valve.
[Middle English, leaf of a door, from Latin valva; see wel- in Indo-European roots.]
valve′less adj.valve (vælv) n1. (Mechanical Engineering) any device that shuts off, starts, regulates, or controls the flow of a fluid2. (Anatomy) anatomy a flaplike structure in a hollow organ, such as the heart, that controls the one-way passage of fluid through that organ3. (Electronics) Also called: tube or vacuum tube an evacuated electron tube containing a cathode, anode, and, usually, one or more additional control electrodes. When a positive potential is applied to the anode, electrons emitted from the cathode are attracted to the anode, constituting a flow of current which can be controlled by a voltage applied to the grid to produce amplification, oscillation, etc. See also diode2, triode1, tetrode, pentode4. (Zoology) zoology any of the separable pieces that make up the shell of a mollusc5. (Music, other) music a device on some brass instruments by which the effective length of the tube may be varied to enable a chromatic scale to be produced6. (Botany) botany a. any of the several parts that make up a dry dehiscent fruit, esp a capsuleb. either of the two halves of a diatom cell wall7. (Architecture) archaic a leaf of a double door or of a folding door[C14: from Latin valva a folding door] ˈvalveless adj ˈvalveˌlike adjvalve (vælv)
n., v. valved, valv•ing. n. 1. any device for halting or controlling the flow of something, as a liquid, through a pipe or other passage. 2. a hinged lid or other movable part that closes or modifies the passage in such a device. 3. a membranous structure that permits the flow of a fluid, as blood, in one direction only. 4. (in brass instruments) a device for changing the length of the air column to alter the pitch of a tone. 5. one of the two or more separable pieces composing certain shells: the valves of a clamshell. 6. Bot. a. one of the segments into which a fruit capsule dehisces. b. a flap or lidlike part of certain anthers. 7. Chiefly Brit. vacuum tube. 8. Archaic. one of the leaves of a double or folding door. v.t. 9. to provide with a valve. [1350–1400; Middle English < Latin valvae leaves of a door] valve′less, adj. valve′like`, adj. val′vu•lar, val′val, val′var, adj. valve (vălv)1. a. Any of various mechanical devices that control the flow of liquids, gases, or loose material through pipes or channels by blocking and uncovering openings.b. The movable part or element of such a device.2. Any of various structures that prevent the backward flow of a body fluid. Examples include the valves between the chambers of the heart and the valves of the veins.3. One of the paired hinged shells of certain mollusks, such as clams and oysters.valve(electronic) vacuum tubeThesaurus| Noun | 1. |  valve - a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through itanatomical structure, bodily structure, body structure, complex body part, structure - a particular complex anatomical part of a living thing; "he has good bone structure"ticker, heart, pump - the hollow muscular organ located behind the sternum and between the lungs; its rhythmic contractions move the blood through the body; "he stood still, his heart thumping wildly"cardiac valve, heart valve - a valve to control one-way flow of bloodvalvelet, valvula, valvule - a small valveileocecal valve - valve between the ileum of the small intestine and the cecum of the large intestine; prevents material from flowing back from the large to the small intestine | | 2. |  valve - device in a brass wind instrument for varying the length of the air column to alter the pitch of a tonebrass instrument, brass - a wind instrument that consists of a brass tube (usually of variable length) that is blown by means of a cup-shaped or funnel-shaped mouthpiecedevice - an instrumentality invented for a particular purpose; "the device is small enough to wear on your wrist"; "a device intended to conserve water" | | 3. |  valve - control consisting of a mechanical device for controlling the flow of a fluidthrottle, throttle valve, accelerator - a valve that regulates the supply of fuel to the engineball valve - any valve that checks flow by the seating of a ballbutterfly valve - a valve in a carburetor that consists of a disc that turns and acts as a throttlechoke - a valve that controls the flow of air into the carburetor of a gasoline engineclack valve, clapper valve, clack - a simple valve with a hinge on one side; allows fluid to flow in only one directioncontroller, control - a mechanism that controls the operation of a machine; "the speed controller on his turntable was not working properly"; "I turned the controls over to her"exhaust valve - a valve through which burned gases from a cylinder escape into the exhaust manifoldhandwheel - control consisting of a wheel whose rim serves as the handle by which a part is operatedhandwheel - a wheel worked by handintake valve - a valve that controls the flow of fluid through an intakepoppet, poppet valve - a mushroom-shaped valve that rises perpendicularly from its seat; commonly used in internal-combustion enginesescape cock, escape valve, relief valve, safety valve, escape - a valve in a container in which pressure can build up (as a steam boiler); it opens automatically when the pressure reaches a dangerous levelslide valve - valve that opens and closes a passageway by sliding over a port | | 4. | valve - the entire one-piece shell of a snail and certain other molluscsshell - the hard largely calcareous covering of a mollusc or a brachiopod | | 5. | valve - one of the paired hinged shells of certain molluscs and of brachiopodsshell - the hard largely calcareous covering of a mollusc or a brachiopod |
Translationsvalve (vӕlv) noun1. a device for allowing a liquid or gas to pass through an opening in one direction only. 閥 阀2. a structure with the same effect in an animal body. Valves in the heart control the flow of blood in the human body. 瓣膜 瓣膜3. a type of electronic component found in many, especially older, types of television, radio etc. 真空管 真空管IdiomsSeesafety valveSee valve
valve
valve, device for controlling the flow of fluids (liquids and gases). Valves vary in construction and size depending upon their function. Some are classified according to their method of operation or design, e.g., butterfly, gate, globe, lift, needle, piston, and slide valves. Valves are also named for the functions they perform, e.g., check valve (which permits flow in one direction only) and cutoff, bypass, exhaust, intake, safety (see safety valvesafety valve,
device attached to a boiler or other vessel for automatically relieving the pressure of steam before it becomes great enough to cause bursting. The common spring-loaded type is held closed by a spring designed to open the valve when the internal pressure reaches a
..... Click the link for more information. ), and throttle valves. Valves are operated automatically, by hand, or by special mechanism. Valves are employed in the carburetor, diesel engine, internal-combustion engine, pump, and steam engine. In Great Britain an electron tubeelectron tube,
device consisting of a sealed enclosure in which electrons flow between electrodes separated either by a vacuum (in a vacuum tube) or by an ionized gas at low pressure (in a gas tube).
..... Click the link for more information. may be referred to as a valve. In anatomy and physiology the term valve includes the flaps of tissue that help to control the direction of the flow of blood in the heart.Valve a part or device used to control the flow of a gas or fluid in machines and piping by altering the cross-sectional dimensions of the passage. In internal combustion engines, pumps, compressors, and blowers, a valve is a part of the distribution mechanism or of the gas or fluid flow-control mechanism. As a variety of pipe fitting, a valve is used to control the flow of gas, vapor, or liquid. Valves are made up of a housing, which is incorporated into the piping, and a gate, which moves within the housing and alters the dimensions of the bore (and, thereby, the transmissive capacity). Valves are used to develop a pressure differential (throttle valves), to prevent the reverse flow of a fluid (check valves), to release a certain amount of gas, vapor, or liquid when the pressure exceeds a set value (safety valves), to control pressure or flow rate (regulating valves), and to reduce pressure and keep it at a constant level (reducing valves). Valves are also used as stopper fittings to seal off piping, in engineering equipment, and in heat-and-power engineering facilities. Depending on the design of the housing, valves are classed as pass, angled, three-way, and multipath. In terms of the nature of attachment to the piping, they may be flanged or coupled. The gate may be moved manually, electrically, pneumatically, or hydraulically. G. G. MIRZABEKOV valve[valv] (anatomy) A flat of tissue, as in the veins or between the chambers in the heart, which permits movement of fluid in one direction only. (botany) A segment of a dehiscing capsule or legume. The lidlike portion of certain anthers. (electronics) electron tube (invertebrate zoology) One of the distinct, articulated pieces composing the shell of certain animals, such as barnacles and brachiopods. One of two shells encasing the body of a bivalve mollusk or a diatom. (mechanical engineering) A device used to regulate the flow of fluids in piping systems and machinery. Valve A flow-control device. Valves are used to regulate the flow of fluids in piping systems and machinery. In machinery the flow phenomenon is frequently of a pulsating or intermittent character and the valve, with its associated gear, contributes a timing feature. The valves commonly used in piping systems are gate valves (Fig. 1), usually operated closed or wide open and seldom used for throttling; globe valves, frequently fitted with a renewable disk and adaptable to throttling operations; check valves, for automatically limiting flow in a piping system to a single direction; and plug cocks, for operation in the open or closed position by turning the plug through 90° and with a shearing action to clear foreign matter from the seat. Safety and relief valves are automatic protective devices for the relief of excess pressure. See Safety valve For hydraulic turbines and hydroelectric systems, valves and gates control water flow for (1) regulation of power output at sustained efficiency and with minimum wastage of water, and (2) safety under the inertial flow conditions of large masses of water. To control the kinematics of the cycle, steam-engine valves range from simple D-slide and piston valves to multiported types. Many types of reversing gear have been perfected which use the same slide valve or piston valve for both forward and backward rotation of an engine, as in railroad and marine service. See Steam engine Poppet valves are used almost exclusively in internal combustion reciprocating engines because of the demands for tightness with high operating pressures and temperatures (Fig. 2). Two-cycle engines utilize ports, alternately covered and uncovered by the main piston, for inlet or exhaust. See Cam mechanism, Internal combustion engine, Valve train In compressors, valves are usually automatic, operating by pressure difference on the two sides of a movable, springloaded member and without any mechanical linkage to the moving parts of the compressor mechanism. Like those for compressors, pump valves are usually of the automatic type operating by pressure difference. valveA device which regulates or closes off the flow of a fluid.valve1. any device that shuts off, starts, regulates, or controls the flow of a fluid 2. Anatomy a flaplike structure in a hollow organ, such as the heart, that controls the one-way passage of fluid through that organ 3. Electronics an evacuated electron tube containing a cathode, anode, and, usually, one or more additional control electrodes. When a positive potential is applied to the anode, electrons emitted from the cathode are attracted to the anode, constituting a flow of current which can be controlled by a voltage applied to the grid to produce amplification, oscillation, etc. 4. Zoology any of the separable pieces that make up the shell of a mollusc 5. Music a device on some brass instruments by which the effective length of the tube may be varied to enable a chromatic scale to be produced 6. Botanya. any of the several parts that make up a dry dehiscent fruit, esp a capsule b. either of the two halves of a diatom cell wall 7. Archaic a leaf of a double door or of a folding door valve (electronics)UK term for a vacuum tube.valve
valve [valv] a membranous fold in a canal or passage that prevents backward flow of material passing through it.aortic valve a valve" >semilunar valve that separates the left ventricle and the aorta; it opens with end diastole, causing the second heart sound.atrioventricular v's the valves" >cardiac valves between the right atrium and right ventricle (tricuspid valve) and the left atrium and left ventricle (mitral valve).bicuspid valve mitral valve.bicuspid aortic valve a congenital anomaly of the aortic valve, caused by incomplete separation of two of the three cusps; it is generally asymptomatic early in life but is predisposed to calcification and stenosis later on.Braschi valve a one-way valve put into the inspiratory limb of a ventilator circuit in order to measure the pressure" >intrinsic positive end-expiratory pressure.cardiac v's valves that control flow of blood through and from the heart.coronary valve a valve at the entrance of the coronary sinus into the right atrium.flail mitral valve a valve" >mitral valve having a cusp that has lost its normal support (as in ruptured chordae tendineae) and flutters in the blood stream.heart v's cardiac valves.Heimlich valve a small one-way valve used for chest drainage, emptying into a flexible collection device; the valve prevents return of gases or fluids into the pleural space. The Heimlich valve is less than 13 cm (5 inches) long and facilitates patient ambulation; it can be used in many patients instead of a traditional water seal drainage system.ileocecal valve (ileocolic valve) the valve guarding the opening between the ileum and cecum.mitral valve the valve" >cardiac valve between the left atrium and left ventricle, usually having two cusps (anterior and posterior). Called also bicuspid valve. Valves of the heart. The right heart pumps the venous blood into the lungs. The oxygenated blood returns from the lungs into the left atrium and is propelled by the left ventricle into the aorta. The insets show closed valves: the tricuspid valve has three leaflets, whereas the mitral valve has two leaflets. The aortic and pulmonary artery valves have three leaflets and resemble one another except for the fact that the coronary arteries originate from behind the cusps in the aorta. From Damjanov, 1996.posterior urethral valve any of various types of congenital folds across the proximal part of the male urethra near the colliculus" >seminal colliculus, the most common cause of urethral obstruction in male infants.pulmonary valve (pulmonic valve) the pocketlike valve" >cardiac valve that protects the orifice between the right ventricle and the pulmonary artery.pyloric valve a prominent fold of mucous membrane at the pyloric orifice of the stomach.semilunar v's the valves" >cardiac valves that have cusps" >semilunar cusps; see aortic valve and pulmonary valve.thebesian valve coronary valve.tricuspid valve the valve" >cardiac valve guarding the opening between the right atrium and right ventricle.valve of vein (venous v's) any of the small cusps or folds found in the tunica intima of many veins, serving to prevent backflow of blood.valve (valv), [TA] 1. A fold of the lining membrane of a canal or other hollow organ that serves to retard or prevent a reflux of fluid.
See also: valvule, plica. 2. Any formation or reduplication of tissue, or flaplike structure, resembling or functioning as a valve.
See also: valvule, plica. Synonym(s): valva [TA] [L. valva] valve (vălv)n.1. A membranous structure in a hollow organ or passage, as in an artery, that folds or closes to prevent the return flow of the body fluid passing through it.2. Any of various devices that regulate the flow of gases, liquids, or loose materials through piping or through apertures by opening, closing, or obstructing ports or passageways.3. The movable control element of such a device.valve 1. A flapped or flap-like structure. See Aortic valve, Bicuspid valve, Bioengineered heart valve, Bioprosthetic valve, Ileocecal valve, Mitral valve, Pulmonary valve, Ross pulmonary porcine valve, Safe-Connect™ valve, Shiley heart valve, Tricuspid valve.2. A device intended to limit the flow, or prevent the reversal of flow of a liquid or gas from point A to point B.valve (valv) [TA] 1. A fold of the lining membrane of a canal or other hollow organ serving to retard or prevent a reflux of fluid. 2. Any reduplication of tissue or flaplike structure resembling a valve.
See also: valvule, plica[L. valva]valve (valv) [L. valva, leaf of a folding door] Any of various membranous structures in a hollow organ or passage that temporarily close to permit the flow of fluid in one direction only.aortic valve Abbreviation: AoV
The valve at the junction of the left ventricle and the ascending aorta. It is composed of three segments (semilunar cusps) and prevents regurgitation. See: cardiac valve for illus. Bauhin valve See: Bauhin valveBéraud valve See: Béraud valvebicuspid valveMitral valve.Bjork-Shiley heart valveA synthetic artificial heart valve that is no longer commercially available but remains implanted in thousands of patients. The valve has been known to fracture at its struts during use, which results in death in the majority of cases.  CARDIAC VALVES: with ventricles relapsedcardiac valveAny of the four valves that prevent the backflow of blood as it passes into, through, and out of the heart. In order of the entry of the venous blood into the right atrium, they are the tricuspid, pulmonary, mitral, and aortic. See: illustrationCarpentier-Edwards valve See: Carpentier-Edwards valve.check valveA valve that permits fluids or gases to flow in just one direction. Check valves are used in infusion sets to prohibit backflow of fluids during intravenous therapy. coronary valveThe coronary sinus valve at the entrance of the coronary sinus into the right atrium. Synonym: thebesian valveeustachian valveThe valve at the entrance of the inferior vena cava.external nasal valveThe outermost opening of the nose (the alar rim).flutter valveA one-way valve used in chest tube drainage systems that allows fluids or gases to flow out of the chest, but does not let them reenter the body Synonym: Heimlich flutter valve; Heimlich valveGerlach valve See: Gerlach valvehigh-pressure relief valveA safety device built into a ventilator circuit that protects the patient from excessively high airway pressures by venting excess pressure into the atmosphere.Houston valve See: Houston valveHuschke valveLacrimal plica.ileocecal valveA projection of two membranous folds of the ileum of the small intestine into the cecum of the colon. It prevents backup of fecal material into the small intestine. Synonym: valvula coliinspiratory impedance threshold valve See: inspiratory impedance threshold valveinternal nasal valveNasal valve.Krause valve See: Krause, Karlleft atrioventricular valveMitral valve.mitral valveThe valve that closes the orifice between the left cardiac atrium and the left ventricle during ventricular systole. Synonym: bicuspid valve; left atrioventricular valvenasal valveThe site of greatest obstruction to airflow through the nasal passages. It extends from the bony cave near the piriform aperture into part of the cartilaginous vestibule of the nose. Synonym: internal nasal valvepop-off valveA safety valve that releases gas into the atmosphere from a ventilator circuit when the pressure in the circuit exceeds a known, safe level. TYPES OF MECHANICAL HEART VALVES: A. caged ball valve; B. monoleaflet. C. bileafletprosthetic heart valveA substitute valve used to replace a diseased valve. There are two main types of prostheses: those made from biological tissues, e.g., the heart valves of animals, esp. pigs, and those made from biocompatible materials, e.g., metals or polymers. Biocompatible mechanical valves may be constructed in a variety of ways, e.g., from a ball that moves up and down in a cage; with bileaflet valves that close in the midline; or with a single leaflet (which tilts to open and close). See: illustrationpulmonary valveThe valve at the junction of the right ventricle and pulmonary artery. It is composed of three semilunar cusps and prevents regurgitation of blood from the pulmonary artery back into the right ventricle. See: cardiac valve for illus. pyloric valveThe prominent circular membranous fold at the pyloric orifice of the stomach. Synonym: valvula pylorireducing valveA device to reduce the pressure of gas that has been compressed in a cylinder.right atrioventricular valveTricuspid valve.semilunar valveThe type of valve separating the heart and aorta and the heart and pulmonary artery. See: cardiac valve for illus. thebesian valveCoronary valve.tricuspid valve Abbreviation: TV
The valve that closes the orifice between the right cardiac atrium and right ventricle during ventricular systole. Synonym: right atrioventricular valve; valvula tricuspidalis See: cardiac valve for illus. valve of VaroliusIleocecal valve.valve A structure that allows movement in a predetermined direction only. There are valves in the heart, the veins, the lymphatics, the urethra and elsewhere.valve - a piece of tissue that enables the movement of a liquid (e.g. blood), in one direction only.
- the lid-like part of the shell of brachiopods and barnacles.
- either shell of a bivalve molusc.
- the lid of some ANTHERS.
ValveTissue in the passageways between the heart's upper and lower chambers that controls passage of blood and prevents regurgitation.Mentioned in: Balloon Valvuloplasty, Pulmonary Valve Stenosisvalve (valv) [TA] 1. Fold of lining membrane of a canal or other hollow organ that serves to retard or prevent fluid reflux. 2. Any formation or reduplication of tissue, or flaplike structure, resembling or functioning as a valve. [L. valva]Patient discussion about valveQ. How does alcohol affect someone who has been diagnosed with aortic valve stenosis? My brother has been diagnosed with aortic valve stenosis and also is a smoker and does drink alcohol on the weekends. He knows that he should stop smoking but what about the effects of alcohol? Does this also contribute to his stenosis?A. Alcohol changes blood pressure and speed of the heart- that is not a good idea if you have an Aortic stenosis. Could probably makes things worst. I would avoid alcohol… but he should ask GP. More discussions about valveFinancialSeeTVVALVE
| Acronym | Definition |
|---|
| VALVE➣Volcano Analysis and Visualization Environment (Hawaiian Volcano Observatory) |
See VLVvalve
Words related to valvenoun a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through itRelated Words- anatomical structure
- bodily structure
- body structure
- complex body part
- structure
- ticker
- heart
- pump
- cardiac valve
- heart valve
- valvelet
- valvula
- valvule
- ileocecal valve
noun device in a brass wind instrument for varying the length of the air column to alter the pitch of a toneRelated Words- brass instrument
- brass
- device
noun control consisting of a mechanical device for controlling the flow of a fluidRelated Words- throttle
- throttle valve
- accelerator
- ball valve
- butterfly valve
- choke
- clack valve
- clapper valve
- clack
- controller
- control
- exhaust valve
- handwheel
- intake valve
- poppet
- poppet valve
- escape cock
- escape valve
- relief valve
- safety valve
- escape
- slide valve
noun the entire one-piece shell of a snail and certain other molluscsRelated Wordsnoun one of the paired hinged shells of certain molluscs and of brachiopodsRelated Words |