Lernæacea /(lẽr`nē̇*ā"shē̇*ȧ)/

Ler·næ·a·ce·a

Lernæacea

n. pl.
  1. 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. (Zool.)