Definitions for vitellinvɪˈtɛl ɪn, vaɪ-
Random House Webster's College Dictionary
vi•tel•linvɪˈtɛl ɪn, vaɪ-(n.)
a phosphoprotein in the yolk of eggs.
Origin of vitellin:
1855–60; vitell (us ) + -in1
A protein found in egg yolk
an albuminous body, belonging to the class of globulins, obtained from yolk of egg, of which it is the chief proteid constituent, and from the seeds of many plants. From the latter it can be separated in crystalline form