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Definition of Ectodermal

Ectodermal: Pertaining to the ectoderm or to tissues derived from the ectoderm, one of the three primary germ cell layers that make up the very early embryo. The ectoderm is the outermost of the three layers.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=20841
Last Editorial Review: 6/14/2012

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