C c


    • US Pronunciation
    • US IPA
    • [kawr-ee-oh-uh-lan-toh-is, ‐tois, kohr‐]
    • /ˌkɔr i oʊ əˈlæn toʊ ɪs, ‐tɔɪs, ˌkoʊr‐/
    • US Pronunciation
    • US IPA
    • [kawr-ee-oh-uh-lan-toh-is, ‐tois, kohr‐]
    • /ˌkɔr i oʊ əˈlæn toʊ ɪs, ‐tɔɪs, ˌkoʊr‐/

Definitions of chorioallantois word

  • noun chorioallantois the membrane of a fetus that is formed by the merging of the allantois and the chorion 3
  • noun chorioallantois an enveloping vascular fetal membrane formed by the fusion of chorion and allantois in reptiles, birds, and most mammals: that of chicks is used as a culture medium for growing viruses 3
  • noun chorioallantois 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. 1
  • noun chorioallantois A vascular fetal membrane composed of the fused chorion and adjacent wall of the allantois that in the hen's egg is used as a living culture medium for viruses and for tissues—called also. 1
  • noun chorioallantois (anatomy) The vascular extraembryonic membrane, formed by the fusion of the allantois and the chorion, that makes up the placenta in most mammals; the chorioallantoic membrane. 0

Information block about the term

Origin of chorioallantois

First appearance:

before 1930
One of the 10% newest English words
First recorded in 1930-35

Historical Comparancy

Parts of speech for Chorioallantois


chorioallantois popularity

A pretty common term. Usually people know it’s meaning, but prefer to use a more spread out synonym. About 39% of English native speakers know the meaning and use word.
According to our data about 52% of words is more used. This is a rare but used term. It occurs in the pages of specialized literature and in the speech of educated people.

chorioallantois usage trend in Literature

This diagram is provided by Google Ngram Viewer

See also

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