Also called embryonic shield. in the early embryo of mammals, the flattened inner cell mass that arises at the end of the blastocyst stage and from which the embryo begins to differentiate.
the blastodisk of yolky eggs.
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Question 1 of 10
Origin of embryonic disk
First recorded in 1935–40
Words nearby embryonic disk
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
Medical definitions for embryonic shield (1 of 2)
Medical definitions for embryonic shield (2 of 2)
A platelike mass of cells in the blastocyst from which a mammalian embryo develops.embryonic shield
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.