chorioallantois

noun

cho·​rio·​al·​lan·​to·​is ˌkȯr-ē-(ˌ)ō-ə-ˈlan-tə-wəs How to pronounce chorioallantois (audio)
: 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 chorioallantoic membrane

chorioallantoic adjective

Word History

Etymology

New Latin, from Greek chorion + New Latin allantois

First Known Use

1933, in the meaning defined above

Time Traveler
The first known use of chorioallantois was in 1933

Dictionary Entries Near chorioallantois

Cite this Entry

“Chorioallantois.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/chorioallantois. Accessed 25 Jun. 2024.

Medical Definition

chorioallantois

noun
cho·​rio·​al·​lan·​to·​is ˌkōr-ē-ō-ə-ˈlant-ə-wəs, ˌkȯr- How to pronounce chorioallantois (audio)
: 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 chorioallantoic membrane

chorioallantoic adjective
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