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blastodisk

or blas·to·disc

[blas-tuh-disk]
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noun Embryology.
  1. the blastula that forms as a flattened sphere on top of the yolk in the yolk-laden eggs of birds and reptiles.

Origin of blastodisk

First recorded in 1885–90; blasto- + disk
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for blastodisc

blastodisc

noun
  1. another name for blastoderm
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

blastodisc in Medicine

blastodisk

n.
  1. The disk of active cytoplasm at the animal pole of a telolecithal egg.
  2. The blastoderm, especially in very early stages when its extent is small.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.