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Dictionary


gas•tru•la



Pronunciation: (gas'troo-lu), [key]
n.,
pl. -las, -laePronunciation: (-lē"). [key]
Embryol.
a metazoan embryo in an early state of germ layer formation following the blastula stage, consisting of a cuplike body of two layers of cells, the ectoderm and endoderm, enclosing a central cavity, or archenteron, that opens to the outside by the blastopore: in most animals progressing to the formation of a third cell layer, the mesoderm.

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

gastrovasculargastrulate
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