chorioallantois cho·ri·o·al·lan·to·is (kôr'ē-ō'ə-lān'tō-ĭs)
The highly vascular extraembryonic membrane formed by the fusion of the allantois with the chorion that constitutes the placenta in most mammals.
|a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.|
|the offspring of a zebra and a donkey.|