vitellus
Example Sentences
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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
As a consequence of this superficial concentration we get segmentation of the vitellus, with the production of a morula.
From The Mechanism of Life by Leduc, Stéphane
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 Muller, Fritz
Up to this point the vitellus of the egg, nourished by endosmosis through its membranes, had sufficed for the nutrition of the still very small embryo.
From The Sexual Question A Scientific, psychological, hygienic and sociological study by Forel, Auguste
"The ovarian eggs of all animals are identical, small cells with vitellus, germinal vesicle and germinal spot."
From Facts and Arguments for Darwin by Muller, Fritz