Definitions for

Overview of noun heterostracan

The noun heterostracan has 1 senses? (no senses from tagged texts)
1. heterostracan

(extinct jawless fish with the anterior part of the body covered with bony plates; of the Silurian and Devonian) © 2001-2013, Demand Media, all rights reserved. The database is based on Word Net a lexical database for the English language. see disclaimer
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