acanthodian
/əˌkænˈθəʊdɪən/noun
1- a small spiny-finned fossil fish of a group found chiefly in the Devonian period棘鱼纲化石。
1.1
- Class (or subclass) Acanthodii.棘鱼纲（或亚纲）。
词源
mid 19th cent.: from modern Latin Acanthodii （from ACANTHO-） + -AN.