a North Atlantic scorpaenoid fish, Cyclopterus lumpus, having a globular body covered with tubercles, pelvic fins fused into a sucker, and an edible roe: family Cyclopteridae
2.
any other fish of the family Cyclopteridae
Also called: lumpsucker
Word origin
C16: lump (now obsolete) lumpfish, from Middle Dutch lumpe, perhaps related to lump1