Ler-nē'an, n.

n. [N. Lat. Lernaea, from Lernaeus, Lernean, from Lerna, Gr. Λέρνη, a forest and marsh near Argos, the mythological abode of the hydra.] (Zoöl.) One of a family of parasitic crustacea found attached to fishes. Some species penetrate the skin with their elongated head, and feed on the viscera.