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germ layer

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noun

one of the three primary embryonic cell layers.

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Compare ectoderm, endoderm, mesoderm.

Origin of germ layer

First recorded in 1875–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for germ layer

Historical Examples of germ layer

  • He it was who introduced the terms "Keimhaut" (blastoderm) and "Keimblatt" (germ-layer).

    Form and Function

    E. S. (Edward Stuart) Russell

  • Remak is the second great name in the history of the germ-layer theory.

    Form and Function

    E. S. (Edward Stuart) Russell

  • He used the germ-layer theory to prove the essential unity of type of all the Triploblastica.

    Form and Function

    E. S. (Edward Stuart) Russell

  • If the germ-layer theory is no longer credited, upon what fundamental laws is embryology based?

    The Origin of Vertebrates

    Walter Holbrook Gaskell

  • In this manner the foundations of the germ-layer theory were established in their modern form.

British Dictionary definitions for germ layer

germ layer

noun

embryol any of the three layers of cells formed during gastrulationSee ectoderm, mesoderm, endoderm
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
Medicine definitions for germ layer

germ layer

n.

Any of the three primary cellular layers, the ectoderm, endoderm, or mesoderm, into which most animal embryos differentiate and from which the organs and tissues of the body develop.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Science definitions for germ layer

germ layer

Any of three cellular layers, the ectoderm, endoderm, or mesoderm, into which most animal embryos differentiate in the gastrula stage and from which the organs and tissues of the body develop through further differentiation.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.