\Ler`n[ae]*a"ce*a\ (l[~e]r`n[-e]*[=a]"sh[-e]*[.a]),
n. pl. [NL. See {Lern[ae]a}.] (Zo["o]l.)
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.