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ectoderm

/ˈɛktəʊˌdɜːm/
noun
1.
the outer germ layer of an animal embryo, which gives rise to epidermis and nervous tissue See also mesoderm, endoderm
Derived Forms
ectodermal, ectodermic, adjective

exoderm

/ˈɛksəʊˌdɜːm/
noun
1.
(embryol) another name for ectoderm
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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