Siphonostomata

Si`pho`no`stom´a`ta

n. pl.

1.

(Zool.) A tribe of parasitic copepod Crustacea including a large number of species that are parasites of fishes, as the lerneans. They have a mouth adapted to suck blood.

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.