yolk

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Related to yolks: Egg yolks, Double egg yolk

yolk

 [yōk]
the stored nutrient of the ovum.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

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]
Farlex Partner Medical Dictionary © Farlex 2012

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.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

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]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

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.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

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]
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
Spray dried egg white, egg yolk, and soy protein isolate were purchased from manufacturers and used for the formulae.
Pure Yolks eggs is the only certified organic egg brand in India.
Yolk color is used as a quality determination factor, mainly dependent on the diet and can be easily manipulated (Hunton, 1995).
Chromatographic analyses of xanthophylls in egg yolks from laying hens fed turf bermudagrass (Cynodon dactylon) meal.
That means two yolks are released in quick succession into a hen's reproductive system and end up in the same shell.
Eggs were broken on a flat glass surface for thick and height albumen and yolk. Yolk color was monitored using the Roche color fan (Vuilleumier, 1969).
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.
But it's perfectly okay to eat eggs, so long as you consume the yolks in moderation.
In fact, the ECHO's Michelle Fiddler was more likely to win the National Lottery - with chances of one in 14m - than to discover the four double yolks in a half-dozen box.
FRUITY FRENCH PASTRIES MAKES 12 INGREDIENTS FOR THE PASTRY: | 480g plain flour | 150g icing sugar | 11/2tsp poppy seeds | Finely grated zest of an unwaxed lemon | 225g cold, unsalted butter, diced, plus extra for greasing | 2 medium egg yolks FOR THE CREAM: | 1 medium egg yolk | 25g caster sugar | 250g mascarpone | 1tsp orange-blossom water FOR THE TOPPING: 200g fresh raspberries 2 passion fruit, halved Icing sugar, for dusting 1.