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)

Keep scrolling for more

Other Words from ectoderm

ectodermal \ ˌek-​tə-​ˈdər-​məl How to pronounce ectodermal (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, "Twins treated for genetic disorder in the womb," 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, "Twins treated for genetic disorder in the womb," 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

Keep scrolling for more

Learn More about ectoderm

Statistics for ectoderm

Look-up Popularity

Time Traveler for ectoderm

The first known use of ectoderm was in 1859

See more words from the same year

Keep scrolling for more

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 ectodermal (audio) \ adjective

More from Merriam-Webster on ectoderm

Britannica.com: Encyclopedia article about ectoderm

Comments on ectoderm

What made you want to look up ectoderm? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to complain fretfully

Get Word of the Day daily email!

Test Your Vocabulary

What's that Smell?! Quiz

  • wide eyed dog smelling rose
  • Someone who is hircine smells like a:
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!