2 definitions found
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 1.6 [wn]:
yolk
n : nutritive material of an ovum esp. the yellow mass of a bird
or reptile egg
more about yolk
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