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⇱ chorioallantois - WordReference.com Dictionary of English

chorioallantois

US:USA pronunciation: respellingUSA pronunciation: respelling(kôr′ē ō ə lan′tō is, -tois, kōr′-)


WordReference Random House Unabridged Dictionary of American English © 2026
cho•ri•o•al•lan•to•is  (kôr′ē ō ə lan′tō is, -tois, kōr′-),USA pronunciation n. [Embryol., Zool.]
  1. Developmental Biology, Zoologya vascular, extraembryonic membrane of birds, reptiles, and certain mammals, formed by the fusion of the wall of the chorion with the wall of the allantois. Also called cho′rioallanto′ic mem′brane. 
  • 1930–35

'chorioallantois' also found in these entries (note: many are not synonyms or translations):

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