Tristoma

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Tristoma \Tris"to*ma\ (tr[i^]s"t[-o]*m[.a]), n. [NL., from Gr.
     tri- (see {Tri-}) + sto`ma mouth.] (Zool.)
     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.
     [1913 Webster]