单词	ectoderm
释义	ectoderm noun ec·​to·​derm ˈek-tə-ˌdərm  1 a : the outermost of the three primary germ layers of an embryo that is the source of various tissues and structures (such as the epidermis, the nervous system, and the eyes and ears) b : a tissue (such as neural tissue) derived from this germ layer 2 : the outer layer of cells of a diploblastic animal (such as a jellyfish or sponge) ectodermal ˌek-tə-ˈdər-məl  adjective Example Sentences Recent Examples on the Web There are a number of genetic disorders that can affect the ectoderm; this approach will not work across the board, experts say. Michael Nedelman, CNN, 18 May 2018 The outermost layer, the ectoderm, contributes to a number of structures including the skin, teeth, hair and sweat glands. Michael Nedelman, CNN, 18 May 2018 Word History Etymology International Scientific Vocabulary First Known Use 1859, in the meaning defined at sense 2 Medical Definition ectoderm noun ec·​to·​derm ˈek-tə-ˌdərm  1 : the outermost of the three primary germ layers of an embryo 2 : a tissue (as neural tissue) derived from ectoderm
随便看	illuminating illuminating engineer illuminating engineering illuminating gas illuminating projectile illuminatingly illumination illuminations illuminatism illuminatist illuminative illuminato illuminator illuminators illumine illumined illuminer illuminers illumines illuming language barrier language lab language laboratory languaged languageless

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