One of the mysteries of the English language finally explained.
Of or relating to the group Actinopterygii of bony fishes characterized by membranous fins supported by slender rays or spines.
A fish of the group Actinopterygii; a ray-finned fish.
Late 19th century; earliest use found in Edward Cope (1840–1897). From actino- + -pterygian, after scientific Latin Actinopterygii.
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