yolk
//joʊk//
Noun
yolkSingular
yolksPlural
1
The yellow, spherical part of an egg that is surrounded by the white and provides nutrients for a developing embryo.
The yolk of the egg is rich in protein and vitamins.
2
A greasy substance found in unprocessed sheep's wool.
The yolk in raw sheep's wool must be removed before the wool can be processed.