Yelk. n.s. [from ᵹalƿ, yellow, Saxon.] The yellow part of the egg. It is commonly pronounced, and often written yolk.
The yolk of the egg conduceth little to the generation of the bird, but only to the nourishment of the same: for if a chicken be opened, when it is new hatched, you shall find much of the yolk remaining. Bacon's Nat. Hist.
That a chicken is formed out of the yelk of an egg, with some antient philosophers the people still opinion. Brown.
All the feather'd kind,
From th' included yolk, not ambient white arose. Dryden.