| 释义 |
yellow spot
yellow spotn. See macula lutea.yellow spot n (Anatomy) anatomy another name for macula lutea mac•u•la (ˈmæk yə lə)
n., pl. -lae (-ˌli) -las. 1. a spot, esp. on the skin. 2. a. an opaque spot on the cornea. b. Also called yellow spot. an irregularly oval, yellow-pigmented area on the central retina containing color-sensitive rods and the central point of sharpest vision. [1350–1400; Middle English < Latin: spot, blemish] mac′u•lar, adj. Thesaurus| Noun | 1. | yellow spot - any of several fungous or viral diseases characterized by yellow spotting on the leavesplant disease - a disease that affects plantstomato streak - disease of a wide range of plants (tomatoes, potatoes, peas) resulting from a mixed infection of potato and tomato mosaic | | 2. |  yellow spot - a small yellowish central area of the retina that is rich in cones and that mediates clear detailed visionmacula lutea, macular area, macularegion, area - a part of an animal that has a special function or is supplied by a given artery or nerve; "in the abdominal region"retina - the innermost light-sensitive membrane covering the back wall of the eyeball; it is continuous with the optic nerve |
TranslationsEncyclopediaSeemaculayellow spot
macula of retina [TA] an oval area of the sensory retina, 3 × 5 mm, temporal to the optic disc corresponding to the posterior pole of the eye; at its center is the central fovea, which contains only retinal cones. Synonym(s): macula lutea [TA], area centralis, macula retinae, macular area, punctum luteum, Soemmerring spot, yellow spotyellow spotn. See macula lutea.spotS16-888800 (spot) 1. A small surface area differing in appearance from its surroundings. Synonym: macula2. Randomly collected, as in “spot” urine specimen.ash-leaf spotWhite macules found on the trunk and extremities of persons with tuberous sclerosis.Bitot spots See: Bitot spotsblind spot1. Physiological scotoma situated 15° to the outside of the visual fixation point; the point where the optic nerve enters the eye (optic disk), a region devoid of rods and cones. See: scotoma2. In psychiatry, the inability of an individual to have insight into his or her own personality.blue spotMongolian spot.Brushfield spot See: Brushfield spotcherry-red spotA red spot occurring on the retina in children with Tay-Sachs disease. Synonym: Tay spotcold spotAn area on a nuclear medicine scan in which no radioactive tracer is taken up, indicative of nonfunctioning tissue in a gland or other structure.corneal spotLeukoma.cotton-wool spotA tiny infarct in the retina, present in hypertension, diabetes mellitus, bacterial endocarditis, and other diseases.focal spotThe area on the x-ray tube target that is bombarded with electrons to produce x-radiation.Fordyce spots See: Fordyce diseasegenital spotThe area on the nasal mucosa that tends to bleed during menstruation. See: vicarious menstruationhematocystic spotAny of the focal red marks seen on esophageal varices. They consist of aneurysms of the wall of the dilated blood vessel. Their presence increases the likelihood that the varix may bleed. histo spotsScarring of the macula found in those infected with Histoplasma capsulatum.hot spot1. An area on the surface of the skin that, when stimulated, experiences a sensation of warmth.2. In a nuclear medicine scan, a region of the image that shows an abnormally high concentration of injected isotope.3. Any location that has been radioactively contaminated.4. . In radiation oncology, a tissue region that is exposed to much more radiation than neighboring tissues.hypnogenic spotHypnogenic zone.Koplik spot See: Koplik spotliver spotA popular term for a pigmentary skin discoloration, usually in yellow-brown patches. See: Lentigo senilismilk spotA dense area of macrophages in the omentum. MONGOLIAN SPOTSmongolian spotAny of the blue or mulberry-colored spots usually located in the sacral region. It may be present at birth in Asian, American Indian, black, and Southern European infants and usually disappears during childhood. Synonym: blue spot See: illustrationrose spotsRose-colored maculae occurring on the abdomen or loins in typhoid fever.Roth spots See: Roth spotsruby spotCherry angioma.shin spotsThe colloquial name for necrobiosis lipoidica diabeticorum. This condition is usually, but not always, associated with diabetes. See: necrobiosis lipoidica diabeticorumSoemmering spot See: Soemmering, Samuel T. vonTardieu spot See: Tardieu spotTay spot See: cherry-red spotTrousseau spots See: Trousseau, Armandwhite spotsLight-colored, elevated areas of various sizes occurring on the ventricular surface of the anterior leaflet of the mitral valve in endocarditis.yellow spot Abbreviation: y.s.
Macula (3).yellow spot The MACULA LUTEA of the RETINA.macula luteaAn oval area of the retina 3-5 mm in diameter, with the foveal depression at its centre, slightly below the level of the optic disc and temporal to it (its centre lies 3.5 mm from the edge of the disc). The side wall of the depression slopes gradually towards the centre where the fovea centralis is located and where the best photopic visual acuity is obtained. Around the fovea, the ganglion cells are much more numerous than elsewhere, being arranged in five to seven layers. The outer molecular layer is also thicker than elsewhere and forms the outer fibre layer of Henle and there is a progressive disappearance of rods so that at the foveola only cones are found. The area of the macula lutea is impregnated by a yellow pigment (macular pigment) in the inner layers and for that reason is often called the yellow spot. Syn. area centralis (although that area is considered to be slightly larger, about 5.5 mm in diameter); punctum luteum. See blue field entoptoscope; fovea centralis; macular pigment.yellow spot
Synonyms for yellow spotnoun any of several fungous or viral diseases characterized by yellow spotting on the leavesRelated Words- plant disease
- tomato streak
noun a small yellowish central area of the retina that is rich in cones and that mediates clear detailed visionSynonyms- macula lutea
- macular area
- macula
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