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ectoderm n. 外胚層;外細胞層 外胚層;外細胞層 ectoderm n 1: the outer germ layer that develops into skin and nervous tissue [synonym: {ectoderm}, {exoderm}, {ectoblast}] Ectoderm \Ec"to*derm\, n. [Ecto- -derm.] (Biol.)
(a) The outer layer of the blastoderm; epiblast. (b) The external skin or outer layer of an animal or plant, this being formed in an animal from the epiblast. See Illust. of {Blastoderm}. Ectodermal
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