Actinopterygii

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

Definition of Actinopterygii

in many classifications

  1. :  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

actinopterygious

\¦ak-tə-ˌnäp-tə-ˈri-jē-əs\ adjective

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Origin and Etymology of actinopterygii

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


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