Tristoma

Tristoma

Tris"to*ma\, n. [NL., from Gr. ? (see Tri-) + ? mouth.] (Zo["o]l.) Any one of numerous species of trematode worms belonging to Tristoma and allied genera having a large posterior sucker and two small anterior ones. They usually have broad, thin, and disklike bodies, and are parasite on the gills and skin of fishes.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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