Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The yolk of an egg.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The contents or substance of the ovum; egg yolk.
  • n. Perisperm in an early condition.

from the GNU version of the Collaborative International Dictionary of English

  • n. The contents or substance of the ovum; egg yolk. See Illust. of Ovum.
  • n. Perisperm in an early condition.

from The Century Dictionary and Cyclopedia

  • n. The yolk of an egg; in the broadest sense, the protoplasm of an ovum; the germinative or formative protoplasmic contents of an ovum-cell, which is transformed into the body of the embryo, plus that substance, if any, which nourishes the embryo during its germination and subsequent growth.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. nutritive material of an ovum stored for the nutrition of an embryo (especially the yellow mass of a bird or reptile egg)

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

Latin, probably diminutive of vitulus, calf; see wet-2 in Indo-European roots.

from Wiktionary, Creative Commons Attribution/Share-Alike License

Latin, the yolk of an egg.

Examples

  • Si vero fuerit in aestate vitellus avi semper superponatur.

    Gilbertus Anglicus Medicine of the Thirteenth Century

  • This constitutes the vitelline circulation (Fig. 459), and by means of it nutriment is absorbed from the yolk (vitellus.) 5

    V. Angiology. 3. Development of the Vascular System

  • Special names have been given to these parts of the ovum; the cell-body is called the yelk (vitellus), and the cell-nucleus the germinal vesicle.

    The Evolution of Man — Volume 1

  • "The ovarian eggs of all animals are perfectly identical, small cells with a vitellus, germinal vesicle and germinal spot" (paragraph 278).

    Facts and Arguments for Darwin

  • Until recently it was regarded as a general rule that, by the partial segmentation of the vitellus a germinal disc was formed, and in this, corresponding to the ventral surface of the embryo, a primitive band.

    Facts and Arguments for Darwin

  • Insects are identical, small animals with head, thorax, and abdomen; that is to say if, only noticing what is common to them, we leave out of consideration the difference of their development, the presence or absence and the multifarious structure of the vitelline membrane, the varying composition of the vitellus, the different number and formation of the germinal spots, etc.

    Facts and Arguments for Darwin

  • "The ovarian eggs of all animals are identical, small cells with vitellus, germinal vesicle and germinal spot."

    Facts and Arguments for Darwin

  • Premier League win against Arsenal in aeons and an astonishing demolition job on Chelsea later and those of us who confidently predicted Tottenham's end-of-season collapse have been left picking eggshell, albumen and vitellus from our gormless, slack-jawed faces.

    The Guardian World News

  • "Thus, in Fishes, the first changes consist in the segmentation of the vitellus and the formation of a germ, processes which are common to all classes of animals.

    Facts and Arguments for Darwin

Comments

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  • To the chef, egg yolk.

    September 19, 2009