ectoderm

American  

[ek-tuh-durm] / ˈɛk təˌdɜrm /

noun

Embryology.

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

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ectoderm British  

/ ˈɛktəʊˌdɜːm /

noun

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

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ectoderm Scientific  

/ ĕk′tə-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 mesoderm

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Other Word Forms

• ectodermal
  adjective
• ectodermic
  adjective
• ectodermoidal
  adjective
• subectodermal
  adjective
• subectodermic
  adjective

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Etymology

Origin of ectoderm

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

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Example Sentences

See Examples For:

ectoderm

Moreover, the developmental pathway through surface ectoderm state to amniotic ectoderm state was also observed in primate embryos.

From Science Daily ● Mar. 4, 2024

Dr Nakanoh customised culture conditions for hPSCs and found that the supplements Activin A, BMP4, a GSK3-beta inhibitor, and a MEK inhibitor promoted their differentiation into amniotic ectoderm.

From Science Daily ● Mar. 4, 2024

Using a co-culture technique to form cellular aggregates, he was able to confirm the ability of the generated amniotic ectoderm cells to initiate gastrulation.

From Science Daily ● Mar. 4, 2024

In an unexpected twist, no part of the sea star ectoderm expresses a "trunk" genetic patterning program, suggesting that sea stars are mostly headlike.

From Science Daily ● Nov. 1, 2023

It then makes its way by amœboid movements between the cells of the ectoderm until it reaches the surface.

From Freshwater Sponges, Hydroids & Polyzoa by Nelson Annandale

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