acanthodianPronunciation: /əˌkanˈθəʊdɪən/Definition of acanthodian noun a small spiny-finned fossil fish of a group found chiefly in the Devonian period. Class (or subclass) Acanthodii Origin: mid 19th century: from modern Latin Acanthodii (from acantho-) + -anacanthodian in other Oxford dictionaries Definition of acanthodian in the US English dictionary
