Hypertext Webster Gateway: "vitellus"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Vitellus \Vi*tel"lus\, n. [L., the yolk of an egg.]
1. (Biol.) The contents or substance of the ovum; egg yolk.
See Illust. of {Ovum}.
2. (Bot.) Perisperm in an early condition.
From WordNet (r) 1.7 (wn)
vitellus
n : nutritive material of an ovum stored for the nutrition of an
embryo (especially the yellow mass of a bird or reptile
egg) [syn: {yolk}]
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