'Stegosauria' definitions:

Definition of 'Stegosauria'

From: GCIDE

Stegosauria \Steg`o*sau"ri*a\ (st[e^]g`[-o]*s[add]"r[i^]*[.a]), n. pl. [NL. See Stegosaurus.] (Paleon.) An extinct order of herbivorous dinosaurs, including the genera Stegosaurus, Omosaurus, and their allies. [1913 Webster]