chorioallantois
[ kawr-ee-oh-uh-lan-toh-is, ‐tois, kohr‐ ]
/ ˌkɔr i oʊ əˈlæn toʊ ɪs, ‐tɔɪs, ˌkoʊr‐ /
noun Embryology, Zoology.
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.
Also called
chorioallantoic membrane.
Origin of chorioallantois
First recorded in 1930–35
OTHER WORDS FROM chorioallantois
cho·ri·o·al·lan·to·ic [‐al-uh n-toh-ik] /‐ˌæl ənˈtoʊ ɪk/, adjectiveWords nearby chorioallantois
choric,
chorine,
chorio-,
chorioadenoma,
chorioadenoma destruens,
chorioallantois,
chorioamnionitis,
chorioangioma,
chorioangiosis,
choriocapillaris,
choriocapillary layer
Medical definitions for chorioallantois
chorioallantois
[ kôr′ē-ō′ə-lăn′tō-ĭs ]
n.
The highly vascular extraembryonic membrane formed by the fusion of the allantois with the chorion that constitutes the placenta in most mammals.