Dictionary
blas•te•ma
Pronunciation: (bla-stē'mu), [key]—
n.,
—pl. -mas, -ma•taPronunciation: (-mu-tu). [key]
Embryol.
an aggregation of cells in an early embryo, capable of differentiation into specialized tissue and organs.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.