allantois

Ancient Greek ἀλλαντοειδής (allantoeidḗs, “sausage-shaped”). Compare Greek αλλαντικό (allantikó).

• IPA^(key): /əˈlæntəʊ.ɪs/

allantois (plural allantoises or allantoides)

1. (anatomy) A sac, having a number of functions, that develops in the alimentary canal of the embryos of mammals, birds and reptiles.

• allantoic sac
• allantoid

• Atlas lion