yolk

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yolk

(yōk)

a. The portion of the egg of egg-laying vertebrates, such as reptiles and birds, and of certain invertebrates that consists chiefly of protein and fat and serves as the primary source of nourishment for the early embryo.

b. This portion of the egg of a bird, especially a chicken, which is large, yellow, and surrounded by albumen.

2. A greasy substance found in unprocessed sheep's wool, which is refined to make lanolin.

[Middle English yolke, from Old English geolca, from geolu, yellow; see yellow.]

yolk′y adj.

yolk

(jəʊk)

1. (Zoology) the substance in an animal ovum consisting of protein and fat that nourishes the developing embryo.

2. (Zoology) a greasy substance secreted by the skin of a sheep and present in the fleece

[Old English geoloca, from geolu yellow]

ˈyolkless adj

ˈyolky adj

yolk

(yoʊk, yoʊlk)

n.

1. the yellow and principal substance of an egg, as distinguished from the white.

2. the part of the contents of the egg of an animal that enters directly into the formation of the embryo, together with any material that nourishes the embryo during its formation.

3. a natural grease exuded from the skin of sheep.

[before 1000; Old English geoloca, derivative of geolu yellow]

yolked, adj.

yolk′y, adj.

yolk

(yōk)

The yellow internal part of the egg of a bird or reptile. The yolk is surrounded by the albumen and supplies food to the developing young.

yolk

The part of animal egg cell that serves as a food source for the embryo.

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Noun	1.	yolk - the yellow spherical part of an egg that is surrounded by the albumen egg yolk fixings, ingredient - food that is a component of a mixture in cooking; "the recipe lists all the fixings for a salad" eggs, egg - oval reproductive body of a fowl (especially a hen) used as food
	2.	yolk - nutritive material of an ovum stored for the nutrition of an embryo (especially the yellow mass of a bird or reptile egg) vitellus food, nutrient - any substance that can be metabolized by an animal to give energy and build tissue egg - animal reproductive body consisting of an ovum or embryo together with nutritive and protective envelopes; especially the thin-shelled reproductive body laid by e.g. female birds