Embryonic Structure
ectoderm Audio
ec·to·derm [ ek-tuh-durm ]
Subclass of:
Germ Layers
Etymology:
Greek ektos = outside + derma = the skin
Definitions related to ectoderm:
  • Germ layer facing amniotic cavity.
    Foundational Model of Anatomy
    University of Washington, 2017
  • Outermost of the three germ layers of the embryo (the other two being mesoderm and endoderm); ectoderm gives rise to epidermis and neural tissue.
    CRISP Thesaurus
    National Institutes of Health, 2006
  • The outer of the three germ layers of an embryo.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2021
  • The outer of the three germ layers of the embryo; it gives rise to epidermis and neural tissue.
    NCI Thesaurus
    U.S. National Cancer Institute, 2021
  • Ectoderm, the outermost of the three germ layers, or masses of cells, which appears early in the development of an animal embryo. In vertebrates, ectoderm subsequently gives rise to hair, skin, nails or hooves, and the lens of the eye; the epithelia (surface, or lining, tissues) of sense organs...
    Encyclopedia Britannica
    Encyclopedia Britannica, Inc., 2020
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