chorioallantois

[ kawr-ee-oh-uh-lan-toh-is, ‐tois, kohr‐ ]

nounEmbryology, Zoology.
  1. a 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.

Origin of chorioallantois

1
First recorded in 1930–35
  • Also called chorioallantoic membrane.

Other words from chorioallantois

  • cho·ri·o·al·lan·to·ic [‐al-uhn-toh-ik], /‐ˌæl ənˈtoʊ ɪk/, adjective

Words Nearby chorioallantois

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024