51Թ

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chorioallantois

[ kawr-ee-oh-uh-lan-toh-is, ‑tǾ, dz‑ ]

noun

Embryology, 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.
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Other 51Թ Forms

  • r··l·ٴi [‑-al-, uh, n-, toh, -ik], adjective
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51Թ History and Origins

Origin of chorioallantois1

First recorded in 1930–35

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