From The Collaborative International Dictionary of English v.0.48 :
Branchiura \Bran"chi*u"ra\, n. pl. [NL., fr., Gr. ? gill +
o'yra` tail.] (Zool.)
A group of Entomostraca, with suctorial mouths, including
species parasitic on fishes, as the carp lice ({Argulus).
[1913 Webster]
From WordNet (r) 3.0 (2006) :
Branchiura
n 1: copepods with suctorial mouthparts; parasitic on fishes
[syn: Branchiura, order Branchiura]