noun. ['ˈhægfɪʃ'] eellike cyclostome having a tongue with horny teeth in a round mouth surrounded by eight tentacles; feeds on dead or trapped fishes by boring into their bodies.
1. Noun, singular or mass The ancestors of the hagfish were apparently pushed very deep into the ocean's dark waters. 2. Adjective There are two primary types in the Agnatha class, which are hagfish and lampreys.
