Actinopterygii

plural noun
Ac·​ti·​nop·​te·​ryg·​ii | \ ¦ak-tə-ˌnäp-tə-ˈri-jē-ˌī\

Definition of Actinopterygii

in many classifications
: a subclass or other division of Teleostomi comprising fishes having the projecting part of the paired fins supported only by dermal rays and being coextensive with the Teleostomi excluding the Choanichthyes

Other Words from Actinopterygii

actinopterygious \ ¦ak-​tə-​ˌnäp-​tə-​ˈri-​jē-​əs \ adjective

First Known Use of Actinopterygii

1896, in the meaning defined above

History and Etymology for Actinopterygii

New Latin, from actin- + -pterygii (from Greek pteryg-, pteryx wing); akin to Greek pteron feather, wing

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