Category:Allantoid

Al*lan"toid, Al`lan*toid"al, a. Etym: [Gr. (Anat.)

Defn: Of or pertaining to the allantois.

Al*lan"to*is, Al*lan"toid, } n.. (Anat.)

Defn: A membranous appendage of the embryos of mammals, birds, and reptiles, -- in mammals serving to connect the fetus with the parent; the urinary vesicle.