yolk


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yolk

 [yōk]
the stored nutrient of the ovum.

yolk

(yōk, yōlk),
1. One of the types of nutritive material stored in the oocyte (ovum) for the nutrition of the embryo; yolk is particularly abundant and conspicuous in the eggs of birds. Synonym(s): vitellus
2. Fatty material found in the wool of sheep; when extracted and purified, it becomes lanolin.
[A.S. geolca; geolu, yellow]

yolk

(yōk)
n.
1.
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.

yolk′y adj.

yolk

(yōk)
1. One of the types of nutritive material stored in the oocyte for the nutrition of the embryo; particularly abundant and conspicuous in the eggs of birds.
Synonym(s): vitellus.
2. Fatty material found in the wool of sheep; when extracted and purified, it becomes lanolin.
[A.S. geolca;geolu, yellow]

yolk

the food store in the eggs of the majority of animals, made up mainly of fat and protein granules. It must contain all the essential ingredients for the entire development of the embryo. Where yolk is present in the egg, as in chickens, there is meroblastic CLEAVAGE, but where it is absent, or nearly so, cleavage is holoblastic, as in Amphioxus. Yolk is almost absent from mammal eggs, since food is provided directly from the mother, via the PLACENTA.

yolk

(yōk)
One of the types of nutritive material stored in the oocyte (ovum) for the nutrition of the embryo; particularly abundant and conspicuous in birds' eggs.
[A.S. geolca;geolu, yellow]
References in periodicals archive ?
The water phase was added first, mixed, and then the egg yolk and white were added before adding oil.
Serves 6 Ingredients: 35mls brandy 75g raisins 125g caster sugar 75ml cold water 4 medium Scottish egg yolks 1 tub double cream very lightly whipped 150g pack Specially Selected Scottish fudge, broken up lightly whipped cream, then, freeze overnight.
Perhaps you've just whipped up a bunch of meringues, or an angel food cake, or macaroons, and you've found yourself with egg yolks to spare.
The proportion of yolk and albumen is largely determined by the age and genotype of the hen (Akbar et al., 1983; Ahn et al., 1997).
A YolkFan (DSM Nutritional Products, Parsippany, N.J.) was used to rate yolk color relative to 15 standards.
The flabergasted couple and her son, Ryan, 20, watched in awe as the other four eggs from the same box hit the frying pan with double yolks.
Although one must keep in mind that immunoperoxidase studies may have overlapping results with somatic carcinomas, use of a carefully selected panel to include markers of somatic carcinoma, markers of germ cell tumor (ie, SALL4), and more yolk sac-specific markers (ie, AFP and glypican 3) may be helpful.
Yolk Recruitment has been supported by an additional PS260,000 business finance grant from the Welsh Government for the creation of 29 new jobs by 2018.
Never seen a triple yolk but, in the early 1980s, I bought a dozen eggs from my milkman one Easter and every one was a double yolker.
Place the egg yolks in a mesh strainer and use a rubber spatula or the back of a spoon to press the yolks through and into a medium bowl.
Join the conversation on our Facebook page face com/poolecho " Despite the huge odds, some yolk enthusiasts insist that it isn't that unlikely - as eggs are sorted according to size, meaning heav doubleyolk eggs will get put in the same area.
Made of lotus paste, mooncake is also made of yolk, mooncake symbolizes harmony, unity, and binding relationships.