embryonic disk

embryonic disk

noun Embryology.
1.
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.
2.
the blastodisk of yolky eggs.

Origin:
1935–40

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To embryonic disk
American Heritage
Medical Dictionary

embryonic disk n.

  1. A platelike mass of cells in the blastocyst from which a mammalian embryo develops. Also called embryonic shield.

  2. See germinal disk.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature