chorioallantois
noun Etymology: New Latin, from Greek chorion + New Latin allantois Date: 1933 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 membranechorioallantoic adjective

New Collegiate Dictionary. 2001.

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  • chorioallantois — n. a very vascular fetal membrane composed of the fused chorion and adjacent wall of the allantois. Syn: chorioallantoic membrane. [WordNet 1.5] || …   The Collaborative International Dictionary of English

  • chorioallantois — [kôr΄ē ō΄ə lan′tō is] n. [ModL: see CHORION & ALLANTOIS] 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… …   English World dictionary

  • chorioallantois — chorioallantoic / al euhn toh ik/, adj. /kawr ee oh euh lan toh is, toys, kohr /, n. Embryol., Zool. 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 …   Universalium

  • chorioallantois — noun 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 …   Wiktionary

  • chorioallantois — Extraembryonic membrane formed by the fusion of the allantois with the serosa or false chorion. In mammals it forms the fetal portion of the placenta; in avian embryos it is fused with the shell. * * * cho·rio·al·lan·to·is …   Medical dictionary

  • chorioallantois — cho·rio·allantois …   English syllables

  • chorioallantois — cho•ri•o•al•lan•to•is [[t]ˌkɔr i oʊ əˈlæn toʊ ɪs, tɔɪs, ˌkoʊr [/t]] n. dvl zool. a vascular membrane surrounding the embryo in birds, reptiles, and certain mammals, formed by the fusion of the walls of the chorion and allantois • Etymology:… …   From formal English to slang

  • chorioallantois — noun the very vascular fetal membrane composed of the fused chorion and adjacent wall of the allantois • Syn: ↑chorioallantoic membrane • Hypernyms: ↑membrane, ↑tissue layer * * * “+ noun ( es) …   Useful english dictionary

  • chorioallantoic membrane — chorioallantois …   Medical dictionary

  • chorioallantoic membrane — noun the very vascular fetal membrane composed of the fused chorion and adjacent wall of the allantois • Syn: ↑chorioallantois • Hypernyms: ↑membrane, ↑tissue layer * * * noun see chorioallantois …   Useful english dictionary

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