WordReference Random House Unabridged Dictionary of American English © 2026
rat•fish
(rat′fish′),USA pronunciation n., pl. (esp. collectively) -fish, (esp. referring to two or more kinds or species) -fish•es.
- Fisha chimaera, Hydrolagus colliei, of the Pacific Ocean from Alaska to Lower California, having a ratlike tail.
- rat + fish 1880–85, American.