The Collaborative International Dictionary
Truttaceous
Truttaceous \Trut*ta"ceous\, a. [LL. trutta a trout, L. tructa. See Trout.] (Zo["o]l.) Of, pertaining to, or resembling, a trout; as, fish of the truttaceous kind.
Wiktionary
truttaceous
a. (context zoology English) Of, pertaining to, or resembling, a trout.