vitellus

Now, the human ovum or egg consists of a vitellus or yolk, which is covered by a similar membrane, known as the vitelline.

From What a Young Husband Ought to Know by Sylvanus Stall

Vit′ellary, Vitell′ine, pertaining to the vitellus, or forming such.—n.

From Chambers's Twentieth Century Dictionary (part 4 of 4: S-Z and supplements) by Various

Yolk, yōk, Yelk, yelk, n. the yellow part of an egg: the vitellus of a seed: wool-oil.—adjs.

From Chambers's Twentieth Century Dictionary (part 4 of 4: S-Z and supplements) by Various

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.

From Facts and Arguments for Darwin by Fritz Muller

The literal references to the foregoing are: am, amnion; al, allantois; v, vitellus; h, encephalon; i, eye; c, heart; f, liver; g, gizzard; ms, upper, and mi, lower member.

From Was Man Created? by Henry A. (Henry Augustus) Mott