allantois /a-lanˈtō-is/ noun A membranous sac-like appendage for effecting oxygenation in the embryos of mammals, birds and reptiles ORIGIN: Irregularly formed from Gr allās, -āntos a sausage, and eidos form allantoˈic adjective allanˈtoid /-toid/ adjective - Sausage-shaped
- Relating to the allantois
noun The allantois allantoˈin noun A white crystalline powder produced by the oxidation of uric acid, used in the treatment of wounds, skin irritation, etc. |