| yellow spot | An oval area of the sensory retina, 3 by 5 mm, temporal to the optic disk corresponding to the posterior pole of the eye; at its centre is the central fovea, which contains only retinal cones. Synonym: area centralis, macula lutea, macular area, punctum luteum, Soemmerring's spot, yellow spot. (05 Mar 2000) |
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| yellow vision | <ophthalmology> A form of chromatopsia in which objects looked at appear yellow. Origin: Gr. Opsis = vision (11 May 1997) |
| yellow wax | A yellowish, solid, brittle substance prepared from the honeycomb of the bee, Apis mellifera; the chief constituent is myricin (myricyl palmitate); others are cerotic acid (cerin), melissic acid, heptacosane, and hentriacontane; used in the preparation of ointments, cerates, plasters, and suppositories. (05 Mar 2000) |
| yellow yolk | The chief constituent of the yolk in a bird's egg; it consists of relatively coarse particles of stored food materials and is laid down in concentric zones with interposed thin layers of white yolk. (05 Mar 2000) |
| yellow-eyed | Having yellow eyes. <botany> Yellow-eyed grass, any plant of the genus Xyris. Source: Websters Dictionary (01 Mar 1998) |
| yellow-golds | <botany> A certain plant, probably the yellow oxeye. Source: Websters Dictionary (01 Mar 1998) |
| yellowammer | <zoology> See Yellow-hammer. Source: Websters Dictionary (01 Mar 1998) |
| yellowbill | <zoology> The American scoter. Source: Websters Dictionary (01 Mar 1998) |
| yellowbird | <zoology> The American goldfinch, or thistle bird. See Goldfinch. The common yellow warbler; called also summer yellowbird. Source: Websters Dictionary (01 Mar 1998) |
| yellowfin | <zoology> A large squeteague. Source: Websters Dictionary (01 Mar 1998) |
| yellowfish | <zoology> A rock trout (Pleurogrammus monopterygius) found on the coast of Alaska. Synonym: striped fish, and Atka mackerel. Source: Websters Dictionary (01 Mar 1998) |
| yellowhammer | <zoology> A common European finch (Emberiza citrinella). The colour of the male is bright yellow on the breast, neck, and sides of the head, with the back yellow and brown, and the top of the head and the tail quills blackish. Synonym: yellow bunting, scribbling lark, and writing lark. Alternative forms: yellow-ammer. The flicker. Origin: For yellow-ammer, where ammer is fr. AS. Amore a kind of bird; akin to G. Ammer a yellow-hammer, OHG. Amero. Source: Websters Dictionary (01 Mar 1998) |
| yellowlegs | <zoology> Any one of several species of long-legged sandpipers of the genus Totanus, in which the legs are bright yellow. Synonym: stone snipe, tattler, telltale, yellowshanks; and yellowshins. See Tattler. Source: Websters Dictionary (01 Mar 1998) |
| yellowroot | <botany> Any one of several plants with yellow roots. Specifically: See Xanthorhiza. Same as Orangeroot. Source: Websters Dictionary (01 Mar 1998) Previous: yellow mercury iodide, yellow nail, yellow nail syndrome, yellow precipitateNext: yellow root, yellows, yellowseed, yellowshins, yellow skinyellow root hydrastis |
| yellows | 1. <veterinary> A disease of the bile in horses, cattle, and sheep, causing yellowness of the eyes; jaundice. "His horse . . . Sped with spavins, rayed with the yellows." (Shak) 2. <botany> A disease of plants, especially. Of peach trees, in which the leaves turn to a yellowish colour; jeterus. 3. <zoology> A group of butterflies in which the predominating colour is yellow. It includes the common small yellow butterflies. Synonym: redhorns, and sulphurs. See Sulphur. Source: Websters Dictionary (01 Mar 1998) |