ectoderm definition

  • noun:
    • The outermost of the three major germ levels of an embryo, from which the epidermis, stressed muscle, and, in vertebrates, good sense organs develop.
    • The external level of a diploblastic pet, including a jellyfish.
    • Outermost of this three muscle levels in the embryo of a metazoan pet. Through development, it will produce the skin (skin) and neurological system of person.
    • The outer layer associated with the blastoderm; epiblast.
    • The exterior epidermis or exterior layer of an animal or plant, this being formed in an animal from the epiblast. See Illust. of blastoderm.
    • The completed exterior level of cells, or external blastodermic membrane layer, in all metazoan animals, formed because of the cells of the epiblast, and primitively constituting the external wall of this entire body, as the endoderm does compared to the body-cavity; an epiblast, ectoblast, or exterior blastoderm.
    • the external germ level that develops into skin and stressed structure

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  • Medical Dictionary for "ectoderm"
    • one of several three primary germ…
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