‖n. [ NL., fr. L. Lernaeus Lernæan, fr. Lerna, Gr. Le`rnh, a forest and marsh near Argos, the mythological abode of the hydra. ] (Zool.) A Linnæan genus of parasitic Entomostraca, -- the same as the family Lernæidæ. [ 1913 Webster ]

☞ The genus is restricted by modern Zoologists to a limited number of species similar to Lernæa branchialis found on the gills of the cod. [ 1913 Webster ]

‖n. pl. [ NL. See Lernæa. ] (Zool.) A suborder of copepod Crustacea, including a large number of remarkable forms, mostly parasitic on fishes. The young, however, are active and swim freely. See Illustration in Appendix. [ 1913 Webster ]