embryoblast

[ ĕmbrē-ə-blăst′ ]

n.

Any of the germinal disk cells of the inner cell mass in the blastocyst that form the embryo.

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What does “barren” mean?
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.