Home US English ray-fin

Definition of ray-fin in English:

ray-fin

noun

Zoology

  • A fish belonging to the class Actinopterygii, to which most living bony fishes belong and which includes those having thin fins supported by slender dermal rays; an actinopterygian fish.

Origin

1940s; earliest use found in Alfred Romer (1894–1973), paleontologist and biologist.