WordReference Random House Unabridged Dictionary of American English © 2026
thread•fin
(thred′fin′),USA pronunciation n.
- Fishany spiny-rayed fishes of the family Polynemidae, having the lower part of the pectoral fin composed of numerous, separate, filamentous rays.
- thread + fin 1885–90
'threadfin' also found in these entries (note: many are not synonyms or translations):