1. Primitive eel-like freshwater or anadromous cyclostome having round sucking mouth with a rasping tongue
   "Lampreys attach themselves to fish and feed on their blood and tissues"; "Lamprey eels are parasitic on other fish, attaching with their suction-cup mouths";
   - lamprey eel, lamper eel [informal]

Derived forms: lampreys

Type of: agnathan, jawless fish, jawless vertebrate

Part of: family Petromyzontidae, Petromyzontidae

Encyclopedia: Lamprey, Manitoba