Dictionary
de•lam•i•na•tion
Pronunciation: (dē-lam"u-nā'shun), [key]—
n.
1. a splitting apart into layers.
2. Embryol.the separation of a primordial cell layer into two layers by a process of cell migration.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.