ectoderm Hear it!

ectoderm definition

ecto·derm (ek′tō dʉrm′, -tə-)

noun

  1. the outer layer of cells of an animal embryo, from which the nervous system, skin, hair, teeth, etc. are developed
  2. the layer or layers of cells composing the skin, nervous system, etc. in all animals except protozoans and sponges

Etymology: ecto- + -derm

Related Forms:

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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