ectoderm

noun
ec·​to·​derm | \ ˈek-tə-ˌdərm How to pronounce ectoderm (audio) \

Definition of ectoderm

1a : the outermost of the three primary germ layers of an embryo that is the source of various tissues and structures (such as the epidermis, the nervous system, and the eyes and ears)
b : a tissue (such as neural tissue) derived from this germ layer
2 : the outer layer of cells of a diploblastic animal (such as a jellyfish or sponge)

Other Words from ectoderm

ectodermal \ ˌek-​tə-​ˈdər-​məl How to pronounce ectoderm (audio) \ adjective

Examples of ectoderm in a Sentence

Recent Examples on the Web There are a number of genetic disorders that can affect the ectoderm; this approach will not work across the board, experts say. Michael Nedelman, CNN, 18 May 2018 The outermost layer, the ectoderm, contributes to a number of structures including the skin, teeth, hair and sweat glands. Michael Nedelman, CNN, 18 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'ectoderm.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of ectoderm

1859, in the meaning defined at sense 2

History and Etymology for ectoderm

International Scientific Vocabulary

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Time Traveler for ectoderm

Time Traveler

The first known use of ectoderm was in 1859

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Dictionary Entries Near ectoderm

ectocranial

ectoderm

ectodermoidal

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Cite this Entry

“Ectoderm.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ectoderm. Accessed 25 Jun. 2022.

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More Definitions for ectoderm

ectoderm

noun
ec·​to·​derm | \ ˈek-tə-ˌdərm How to pronounce ectoderm (audio) \

Medical Definition of ectoderm

1 : the outermost of the three primary germ layers of an embryo
2 : a tissue (as neural tissue) derived from ectoderm

Other Words from ectoderm

ectodermal \ ˌek-​tə-​ˈdər-​məl How to pronounce ectoderm (audio) \ adjective

More from Merriam-Webster on ectoderm

Britannica.com: Encyclopedia article about ectoderm

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