Crossword clues for yolk
Longman Dictionary of Contemporary English
The Collaborative International Dictionary
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.]
The yellow part of an egg; the vitellus.
(Zo["o]l.) An oily secretion which naturally covers the wool of sheep.
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.
Douglas Harper's Etymology Dictionary
Old English geolca, geoloca "yolk," literally "the yellow part," from geolu "yellow" (see yellow (adj.)). Formerly also spelled yelk.
n. 1 The yellow, spherical part of an egg that is surrounded by the white albumen, and serves as nutriment for the growing young. 2 The grease in a sheep's fleece.
n. nutritive material of an ovum stored for the nutrition of an embryo (especially the yellow mass of a bird or reptile egg) [syn: vitellus]
The yolk in an egg is material of which the primary function is to supply food for the development of the animal embryo. Some kinds of eggs contain no yolk, for example because they are laid in situations where the food supply is adequate (such as in the body of the host of a parasitoid) or because the embryo develops in the parent's body, which supplies the food, sometimes through a placenta. Reproductive systems in which the mother's body supplies the embryo directly are said to be matrotrophic; those in which the embryo is supplied by yolk are said to be lecithotrophic. In many species, such as all birds, and most reptiles and insects, the yolk takes the form of a special storage organ constructed in the reproductive tract of the mother. In many other animals, especially very small species such as some fishes and invertebrates, the yolk material is not in a special organ,but inside the ovum.
Yolks, being mainly stored food, tend to be very concentrated, and in particular tend to be rich in nutrients such as vitamins, minerals, lipids and proteins. The proteins function partly as food in their own right, and partly in controlling the storage and supply of the other nutrients. For example, in some species the amount of yolk in an egg cell affects the developmental processes that follow fertilization. Yolk is not living cell material like protoplasm, but largely passive material, that is to say deutoplasm, in this case functioning mainly as food for the embryo. The food material, plus associated control structures, is supplied by the maternal body during the process called oogenesis. Some of the material is stored more or less in the form in which the maternal body supplied it, partly as processed by dedicated non-germ tissues in the egg, while part of the biosynthetic processing into its final form happens in the oocyte itself.
Apart from animals, other organisms, like algae, specially in the oogamous, can also accumulate resources in their female gametes. In gymnosperms, the remains of the female gametophyte serve also as food supply, and in flowering plants, the endosperm.
Usage examples of "yolk".
Through the ripples of the water Addle could see the sun quivering like the yolk of an egg.
Dip into a little aspic jelly or melted gelatine and arrange the quarters in the form of a circle, with the yolks outside.
Flake with a fork, and mix with Bechamel Sauce to which has been added the yolks of four eggs well-beaten, half a cupful of grated Parmesan cheese, and lemon-juice and grated nutmeg to season.
Season with paprika or a dash of cayenne, and when thoroughly heated stir in the yolks of two eggs, diluted with a little hot cream.
Take from the fire, season with salt and cayenne, add the beaten yolk of an egg, and serve.
After a lot of jiggling, a fuzzy dot centered itself, grew in size, and sharpened into the image of a feathery coil of light with a golden yolk at the center.
Press through a colander and put into a pint of boiling milk, thickened with a tablespoonful each of butter and flour, dilute this with soup stock or chicken broth, and just before taking up add the yolks of two eggs well beaten and two tablespoonfuls of cream.
Press into the spinach on each round of bread a quarter of a hard-boiled egg cut lengthwise, having the yolk uppermost.
He was eating eggs and white manchet, just as he had through the months before we left for the Common, spooning the yolk onto his bread and pressing salt into the yolk in precisely the same way.
Mash the fish and mix with two cupfuls of mashed potatoes, pepper to season, and the yolks of two eggs well beaten.
Add a tablespoonful each of lemon-juice chopped pickles, and capers, a teaspoonful each of minced parsley and mustard, and the mashed yolk of a hard-boiled egg.
Cover with the sauce and put the egg yolks through a ricer into the center.
Press the cheese through a potato ricer or sieve, then add the sugar, salt, butter, lemon juice, and the egg yolks well beaten and mixed with the milk.
Sam Vimes said you probably like the yolk runny and some toast cut up into soldiers.
Instead, there was a noise like scissors closing and the air rained runny yolk and bits of shell.