[ ahr-thruh-dahyuh r ]
/ ˈɑr θrəˌdaɪər /
any of numerous fishes of the extinct order Arthrodira, widely distributed during the Devonian Period, having the anterior part of the body covered by a shield of bony plates.
Origin of arthrodire
< New Latin Arthrodira, equivalent to arthro- arthro- + -dira < Greek deirḗ neck, throat
Related formsar·thro·di·ran [ahr-thruh-dahy-ruh n] /ˌɑr θrəˈdaɪ rən/, ar·thro·di·rous, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019