- the outer germ layer in the embryo of a metazoan.
Origin of ectoderm
Also called ectoblast.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for ectoderm
Metablastic: relating to the ecto- or meta-blast or ectoderm.
Ectoblast: the outer wall of a cell; the ectoderm or epiblast.
The outer is the Ectoderm and the inner is the Endoderm or Hypoblast.The Ethics of Medical Homicide and Mutilation
The ectoderm retains its ciliation only in the sensory organs.
It consists of three layers: ectoderm, endoderm, and mesoderm.The Sea-beach at Ebb-tide
Augusta Foote Arnold
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
Word Origin and History for ectoderm
Online Etymology Dictionary, © 2010 Douglas Harper
- The outermost of the three primary germ layers of an embryo, from which the epidermis, nervous tissue, and sense organs develop.ectoblast
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