Hypertext Webster Gateway: "yolk"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Yolk \Yolk\ (y[=o]lk or y[=o]k; 277), n. [OE. yolke, yelke,
[yogh]olke, [yogh]elke, AS. geoloca, geoleca, fr. geolu
yellow. See {Yellow}.] [Written also {yelk}.]
1. The yellow part of an egg; the vitellus.
2. (Zo["o]l.) An oily secretion which naturally covers the
wool of sheep.
{Yolk cord} (Zo["o]l.), a slender cord or duct which connects
the yolk glands with the egg chambers in certain insects,
as in the aphids.
{Yolk gland} (Zo["o]l.), a special organ which secretes the
yolk of the eggs in many turbellarians, and in some other
invertebrates. See Illust. of {Hermaphrodite} in Appendix.
{Yolk sack} (Anat.), the umbilical vesicle. See under
{Unbilical}.
From WordNet (r) 1.7 (wn)
yolk
n : nutritive material of an ovum stored for the nutrition of an
embryo (especially the yellow mass of a bird or reptile
egg) [syn: {vitellus}]
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