WordReference Random House Unabridged Dictionary of American English © 2026
ac•an•thop•ter•yg•i•an
(ak′ən thop′tə rij′ē ən),USA pronunciation adj.
n.
- Fishbelonging or pertaining to the Acanthopterygii (Acanthopteri), the group of spiny-finned fishes, including the bass and perch.
n.
- Fishan acanthopterygian fish.
- Neo-Latin Acanthopterygi(i) (acantho- acantho- + Greek pterýgi(on) small wing, fin + Latin -ī masculine plural ending) + -an
- 1825–35
'acanthopterygian' also found in these entries (note: many are not synonyms or translations):