Actinopterygii
plural noun
Ac·ti·nop·te·ryg·ii
¦ak-tə-ˌnäp-tə-ˈri-jē-ˌī
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
actinopterygious adjective
¦ak-tə-ˌnäp-tə-ˈri-jē-əs
Word History
Etymology
New Latin, from actin- + -pterygii (from Greek pteryg-, pteryx wing); akin to Greek pteron feather, wing
First Known Use
1896, in the meaning defined above