| 释义 |
macula
mac·u·la M0016700 (măk′yə-lə)n. pl. mac·u·lae (-lē′) or mac·u·las 1. a. An opaque spot on the cornea.b. The macula lutea.2. See macule2.
[Middle English, from Latin.]
mac′u·lar adj.macula (ˈmækjʊlə) or maculen, pl -ulae (-jʊˌliː) or -ules1. (Anatomy) a small spot or area of distinct colour, esp the macula lutea2. (Anatomy) any small discoloured spot or blemish on the skin, such as a freckle[C14: from Latin] ˈmacular adjmac•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. mac·u·la (măk′yə-lə) An area near the center of the retina in vertebrate animals where vision is sharpest.Thesaurus| Noun | 1. |  macula - a cooler darker spot appearing periodically on the sun's photosphere; associated with a strong magnetic fieldsunspotmaculation, patch, speckle, dapple, fleck, spot - a small contrasting part of something; "a bald spot"; "a leopard's spots"; "a patch of clouds"; "patches of thin ice"; "a fleck of red" | | 2. |  macula - a small yellowish central area of the retina that is rich in cones and that mediates clear detailed visionmacula lutea, macular area, yellow spotregion, 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 | | 3. | macula - a patch of skin that is discolored but not usually elevated; caused by various diseasesmaculemaculation, patch, speckle, dapple, fleck, spot - a small contrasting part of something; "a bald spot"; "a leopard's spots"; "a patch of clouds"; "patches of thin ice"; "a fleck of red"cutis, skin, tegument - a natural protective body covering and site of the sense of touch; "your skin is the largest organ of your body"freckle, lentigo - a small brownish spot (of the pigment melanin) on the skinliver spot - a type of skin disease that causes brown spots on the skinplague spot - a spot on the skin characteristic of the plague |
Translationsmacula
macula, macule Anatomy1. a small spot or area of distinct colour, esp the macula lutea 2. any small discoloured spot or blemish on the skin, such as a freckle macula (mak -yŭ-lă) (plural: maculae) a dark patch on the surface of a planet or satellite. The word is used in the approved name of such a feature.macula[′mak·yə·lə] (anatomy) Any anatomical structure having the form of a spot or stain. macula
macula [mak´u-lah] (L.) 1. a stain, spot, or thickening; in anatomy, an area distinguishable by color or otherwise from its surroundings. Often used alone to refer to the macula retinae.2. a discolored spot on the skin that is not raised above the surface; called also macule.3. a corneal scar that can be seen without special optical aids; it presents as a gray spot intermediate between a nebula" >nebula and a leukoma" >leukoma.4. macula lutea. adj., adj mac´ular, mac´ulate.acoustic maculae (ma´culae acus´ticae) the macula sacculi and macula utriculi considered together.macula atro´phica a white atrophic patch on the skin.macula ceru´lea a blue patch on the skin seen in pediculosis.macula cribro´sa a perforated spot or area; one of three perforated areas (inferior, medial, and superior) in the wall of the vestibule of the ear through which branches of the vestibulocochlear nerve pass to the saccule, utricle, and semicircular canals.macula den´sa a zone of heavily nucleated cells in the distal renal tubule that feed information to the juxtaglomerular cells.macula fla´va a yellow nodule at one end of a vocal cord.macula folli´culi follicular stigma.macula germinati´va germinal area; the part of the ovum where the embryo is formed.macula lu´tea (macula lu´tea re´tinae) (macula re´tinae) an irregular yellowish depression on the retina, lateral to and slightly below the optic disk; receives and analyzes light only from the center of the visual field.macula sac´culi a thickening on the wall of the saccule where the epithelium contains hair cells that receive and transmit vestibular impulses.macula utri´culi a thickening in the wall of the utricle where the epithelium contains hair cells that are stimulated by linear acceleration and deceleration and by gravity.mac·u·la, pl. mac·u·lae (mak'yū-lă, -ū-lē), 1. A circumscribed flat area, up to 1 cm in diameter, differing perceptibly in color from the surrounding tissue.
See also: spot.
See also: neuroepithelium of macula. 2. A small discolored patch or spot on the skin, neither elevated above nor depressed below the skin's surface.
See also: spot.
See also: neuroepithelium of macula. 3. The neuroepithelial sensory receptors of the utricle and saccule of the vestibular labyrinth collectively.
See also: neuroepithelium of macula. Synonym(s): maculae utriculosaccularis [TA] Synonym(s): macule, spot (1) [L. a spot] macula (măk′yə-lə)n. pl. macu·lae (-lē′) or macu·las 1. a. An opaque spot on the cornea.b. The macula lutea.2. See macule2.
mac′u·lar adj.macula A circular area measuring 5 to 6 mm in diameter which is located on the posterior central retina. The macula has the fovea at its centre, which lies within the vacular arcades of the retina; it has a high concentration of photoreceptors, facilitates central vision and permits high-resolution visual acuity.mac·u·la, pl. maculae (mak'yū-lă, -lē) 1. A small spot, perceptibly different in color from the surrounding tissue. 2. A small, discolored patch or spot on the skin, neither elevated above nor depressed below the skin's surface. 3. In ocular anatomy, indicates that portion of the retina located within the major vascular arcades, temporal to the optic nerve.
Synonym(s): macule, spot (1) . [L. a spot]macula Any small flat spot.macula an area of acute vision on the retina of many vertebrates which lack a FOVEA.MaculaThe central part of the retina where the rods and cones are densest.Mentioned in: Eye ExaminationfoveacentralisA small area of the retina of approximately 1.5 mm in diameter situated within the macula lutea. At the fovea centralis, the retina is the thinnest as there are no supporting fibres of Mueller, no ganglion cells and no bipolar cells. These cells are shifted to the edge of the depression. The fovea centralis contains mainly cone cells, each one being connected to only one ganglion cell and thus contributing to the highest visual acuity of the retina. The visual field represented by the fovea centralis is equal to about 5º (Fig. F9). Syn. foveal pit; macula (term often used by clinicians). See central visual acuity; retinal image; macula lutea. " > Fig. F9 Cross-section of the retina showing the fovea centralis and foveola (rod-free area)
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.mac·u·la, pl. maculae (mak'yū-lă, -lē) 1. [TA] Circumscribed flat area, differing perceptibly in color from surrounding tissue. 2. Small discolored patch on skin, neither elevated above nor depressed below skin's surface. 3. Neuroepithelial sensory receptors of utricle and saccule of vestibular labyrinth collectively.
Synonym(s): spot (1) . [L. a spot]macula
Related to macula: macula densa, macula adherensSynonyms for maculanoun a cooler darker spot appearing periodically on the sun's photosphereSynonymsRelated Words- maculation
- patch
- speckle
- dapple
- fleck
- spot
noun a small yellowish central area of the retina that is rich in cones and that mediates clear detailed visionSynonyms- macula lutea
- macular area
- yellow spot
Related Wordsnoun a patch of skin that is discolored but not usually elevatedSynonymsRelated Words- maculation
- patch
- speckle
- dapple
- fleck
- spot
- cutis
- skin
- tegument
- freckle
- lentigo
- liver spot
- plague spot
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