Allantoidea

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Allantoidea \Al`lan*toid"e*a\, n. pl. [NL.] (Zool.)
     The division of Vertebrata in which the embryo develops an
     allantois. It includes reptiles, birds, and mammals.
     [1913 Webster]