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View synonyms for ectoderm

ectoderm

[ ek-tuh-durm ]

noun

, Embryology.
  1. the outer germ layer in the embryo of a metazoan.


ectoderm

/ ˈɛktəʊˌdɜːm /

noun

  1. the outer germ layer of an animal embryo, which gives rise to epidermis and nervous tissue See also mesoderm endoderm


ectoderm

/ ĕktə-dûrm′ /

  1. The outermost of the primary germ layers of an animal embryo. In vertebrates, the ectoderm gives rise to the epidermis and associated tissues (such as hair and sweat glands), enamel of the teeth, sense organs, nervous system, and lining of the nose, mouth, and anus.
  2. Compare endoderm


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Derived Forms

  • ˌectoˈdermal, adjective

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Other Words From

  • ecto·dermal ecto·dermic adjective
  • ec·to·der·moi·dal [ek-toh-der-, moid, -l], adjective
  • subec·to·dermal adjective
  • subec·to·dermic adjective

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Word History and Origins

Origin of ectoderm1

First recorded in 1860–65; ecto- + -derm

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Example Sentences

The terms ectoderm and entoderm were introduced by Allman in 1853 for the two cell-layers in the Hydrozoa.

Ontogeny teaches unmistakably that its elementary organs, the epidermic cells, develop entirely from the ectoderm.

Amongst other structures which arise from the important layer of ectoderm are the teeth.

The skin corresponds with the ectoderm of Hydra, although it is a vastly more complicated affair.

In the typical invertebrate eye, on the contrary, the retinal cells are differentiated from the external ectoderm.

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