order Ostracodermi or·de·rost·racodermi uncommon noun 1. extinct group of armored jawless vertebrates; taxonomy is not clear SynonymsOstracodermiorder Ostracodermi Related words Broader terms animal order Parts Agnatha Part of ostracodermHeterostraciOsteostraci WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
