Lernaeacea
Ler`nae`a´ce`a
(lẽr`nė`ā´shė`å)| n. pl. | 1. | (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. |
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.