First Known Use: 1859
Dictionary
ectoderm
noun ec·to·derm \ˈek-tə-ˌdərm\
Definition of ECTODERM
1
: the outer cellular membrane of a diploblastic animal (as a jellyfish)
2
a : the outermost of the three primary germ layers of an embryo that is the source of various tissues and structures (as the epidermis, the nervous system, and the eyes and ears) b : a tissue (as neural tissue) derived from this germ layer
— ec·to·der·mal \ˌek-tə-ˈdər-məl\ adjective
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Origin of ECTODERM
International Scientific Vocabulary
Medical Dictionary
ectoderm
noun ec·to·derm \ˈek-tə-ˌdərm\
Medical Definition of ECTODERM
1
: the outermost of the three primary germ layers of an embryo
2
: a tissue (as neural tissue) derived from ectoderm
—ec·to·der·mal \ˌek-tə-ˈdər-məl\ adjective
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