branchiura

from The Century Dictionary.

• A suborder of parasitic crustaceans, of the order Simphonostoma; the carp-lice.

from the GNU version of the Collaborative International Dictionary of English.

• noun plural (Zoöl.) A group of Entomostraca, with suctorial mouths, including species parasitic on fishes, as the carp lice (Argulus).

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun copepods with suctorial mouthparts; parasitic on fishes