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  1. ectoderm

    • IPA[ˈɛktədəːm]

    英式

    • n.
      the outermost layer of cells or tissue of an embryo in early development, or the parts derived from this, which include the epidermis, nerve tissue, and nephridia.
    • noun: ectoderm, plural noun: ectoderms

    • 更多解釋
    • IPA[ˈektəˌdərm]

    美式

    • n.
      the outermost layer of cells or tissue of an embryo in early development, or the parts derived ...

    Oxford American Dictionary