Yolk Yolk (y[=o]lk or y[=o]k; 277), n. [OE. yolke, yelke, [yogh]olke, [yogh]elke, AS. geoloca, geoleca, fr. geolu yellow. See {Yellow}.] [Written also {yelk}.] [1913 Webster] 1. The yellow part of an egg; the vitellus. [1913 Webster]

2. (Zo["o]l.) An oily secretion which naturally covers the wool of sheep. [1913 Webster]

{Yolk cord} (Zo["o]l.), a slender cord or duct which connects the yolk glands with the egg chambers in certain insects, as in the aphids.

{Yolk gland} (Zo["o]l.), a special organ which secretes the yolk of the eggs in many turbellarians, and in some other invertebrates. See Illust. of {Hermaphrodite} in Appendix.

{Yolk sack} (Anat.), the umbilical vesicle. See under {Unbilical}. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • yolk — [jəuk US jouk, jelk] n [U and C] ↑eggcup, ↑shell, ↑white, ↑yolk [: Old English; Origin: geoloca, from geolu; YELLOW1] the yellow part in the centre of an egg →↑white …   Dictionary of contemporary English

  • yolk — O.E. geolca, geoloca yolk, lit. the yellow part, from geolu yellow (see YELLOW (Cf. yellow)). Formerly also spelled yelk …   Etymology dictionary

  • yolk — [yōk] n. [ME yolke < OE geolca, yolk, lit., yellow part, akin to geolu,YELLOW] 1. the yellow, principal substance of an egg, as distinguished from the albumen, or white: see EGG1 2. Biol. the protein and fat stored in the ovum, serving as… …   English World dictionary

  • yolk — yolk. См. дейтоплазма. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • yolk — [ jouk ] noun count or uncount the middle part of an egg that is yellow …   Usage of the words and phrases in modern English

  • yolk — ► NOUN ▪ the yellow internal part of a bird s egg, which is rich in protein and fat and nourishes the developing embryo. DERIVATIVES yolked adjective yolky adjective. ORIGIN Old English, related to YELLOW(Cf. ↑yellowy) …   English terms dictionary

  • Yolk — Fondé en 1999 Fondateur Alban Darche, Sébastien Boisseau Jean Louis Pommier Genre(s) Jazz Pays d origine …   Wikipédia en Français

  • yolk — yolked, adj. yolkless, adj. yolky, adj. /yohk, yohlk/, n. 1. the yellow and principal substance of an egg, as distinguished from the white. 2. Embryol. the part of the contents of the egg of an animal that enters directly into the formation of… …   Universalium

  • yolk — [[t]jo͟ʊk[/t]] yolks N VAR The yolk of an egg is the yellow part in the middle. Only the yolk contains cholesterol. ...buttered toast dipped in egg yolk …   English dictionary

  • yolk — UK [jəʊk] / US [joʊk] noun [countable/uncountable] Word forms yolk : singular yolk plural yolks the middle part of an egg that is yellow …   English dictionary

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