blastodisk


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Related to blastodisk: blastoderm

blastodisk

[′blas·tə‚disk]
(embryology)
The embryo-forming, protoplasmic disk on the surface of a yolk-filled egg, such as in reptiles, birds, and some fish.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.