‖n. [ NL., from Gaston M. Plante, the discover + Gr. &unr_; bird. ] (Paleon.) A genus of large eocene birds from the Paris basin. [ 1913 Webster ]
n. [ Gr. me`gas great + sto`ma mouth. ] (Zool.) One of a group of univalve shells, having a large aperture or mouth. [ 1913 Webster ]