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An oily secretion which naturally covers the wool of sheep. Yolk cord (Zoöl.), a slender cord or duct which connects the yolk glands with the egg chambers in certain insects, as in the aphids. -- Yolk gland (Zoöl.), a special organ which secretes the yolk of the eggs in many turbellarians, and in some other invertebra…

Having the food yolk placed at the center of the ovum, segmentation being either regular or unequal. Balfour.

uminous substance which exists in the white of the bird's egg, and serves to maintain the yolk in its position; the treadle.

The germinating point in the embryo of a seed; the point in the yolk of an egg at which development begins.

A mixture of turpentine and the yolk of an egg, formerly used as an emulsion.

the cytoplasm of an ovum or a cell, as distinguished from the active or true protoplasm; yolk substance; yolk.

leg of turkey. W. Irving. deviled egg a hard-boiled egg, sliced into halves and with the yolk removed and replaced with a paste, usually made from the yolk and mayonnaise, seasoned with salt and/or spices such as paprika.

Having the food yolk, at the commencement of segmentation, in a peripheral position, and the cleavage process confined to the center of the egg; as, ectolecithal ova.

roundish body laid by domestic poultry and other birds, tortoises, etc. It consists of a yolk, usually surrounded by the "white" or albumen, and inclosed in a shell or strong membrane.

An emulsion of glycerin and the yolk of eggs, used as an ointment, as a vehicle for medicines, etc.

A sauce consisting essentially of a seasoned emulsion of butter and yolk of eggs with a little lemon juice or vinegar.

Undergoing complete segmentation; composed entirely of germinal matter, the whole of the yolk undergoing fission; -- opposed to meroblastic.

A substance from the egg yolk of osseous fishes.

A nitrogenous substance resembling vitellin, present in the egg yolk of cartilaginous fishes.

A substance from the yolk of salmon's egg.

ted through the animal body, and especially conspicuous in the brain and nerve tissue, in yolk of eggs, and in the white blood corpuscles.

A sauce compounded of raw yolks of eggs beaten up with olive oil to the consistency of a sirup, and seasoned with vinegar, pepper, salt, etc.; -- used in dressing salads, fish, etc. Also, a dish dressed with this sauce.

haracterized by partial segmentation only; as, meroblastic ova, in which a portion of the yolk only undergoes fission; meroblastic segmentation; -- opposed to holoblastic.

ing organism, by a natural process of growth or development; as, the metamorphosis of the yolk into the embryo, of a tadpole into a frog, or of a bud into a blossom. Especially, that form of sexual reproduction in which an embryo undergoes a series of marked changes of external form, as the chrysalis stage, pupa stage,…

texture, made of sweetened and flavored whipped cream, sometimes with the addition of egg yolks and gelatin. Mousse differs from ice cream in being beaten before -- not during -- the freezing process.