Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The central cavity of the gastrula, which ultimately becomes the intestinal or digestive cavity.

from The Century Dictionary.

  • noun The enteron (which see) in its original or primitive undifferentiated state: opposed to metenteron.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Biol.) The primitive enteron or undifferentiated digestive sac of a gastrula or other embryo. See Illust. under invagination.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun anatomy A primitive alimentary cavity

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun central cavity of the gastrula; becomes the intestinal or digestive cavity

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

arch- from Latin archi- from Ancient Greek ἀρχι- (archi-) + enteron from Ancient Greek ἔντερον (enteron, "gut").

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