order Ichthyosauria or·de·richt·hyosauria uncommon noun 1. extinct marine reptiles: ichthyosaurs SynonymsIchthyosauriaorder Ichthyosauria Related words Broader terms animal order Parts Archosauria Part of ichthyosaurIchthyosauridae WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
