Source : Webster's Revised Unabridged Dictionary (1913)

Argulus \Ar"gu*lus\, n. [NL., dim of Argus.] (Zo["o]l.)
   A genus of copepod Crustacea, parasitic of fishes; a fish
   louse. See {Branchiura}.

Branchiura \Bran"chi*u"ra\, n. pl. [NL., fr., Gr. ? gill + ?
   tail.] (Zo["o]l.)
   A group of Entomostraca, with suctorial mouths, including
   species parasitic on fishes, as the carp lice ({Argulus}).