The Collaborative International Dictionary of English v.0.48:
Ictodosauria \Ictodosauria\ n. An order of extinct reptiles of the Upper Triassic. Syn: order Ictodosauria. [WordNet 1.5]WordNet (r) 3.0 (2006):
Ictodosauria n 1: extinct reptiles of the later Triassic period [syn: Ictodosauria, order Ictodosauria]