Allantoidea
Al`lan`toid´e`a
n. pl. | 1. | (Zool.) The division of Vertebrata in which the embryo develops an allantois. It includes reptiles, birds, and mammals. |
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
n. pl. | 1. | (Zool.) The division of Vertebrata in which the embryo develops an allantois. It includes reptiles, birds, and mammals. |