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blas•to•cyst



Pronunciation: (blas'tu-sist), [key]
n. Embryol.
the blastula of the mammalian embryo, consisting of an inner cell mass, a cavity, and an outer layer, the trophoblast.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

blastocoelblastoderm
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