Wordnet 3.0
ADJECTIVE (1)
1. 
 having or involving three colors; 
- Example: "trichromatic vision"- Example: "a trichromatic printing process"- Example: "trichromatic staining is the staining of tissue samples differentially in three colors"- Example: "tricolor plumage"- Example: "a tricolor process in photography"[syn: trichromatic, trichrome, tricolor]
WordNet (r) 3.0 (2006):
trichrome
    adj 1: having or involving three colors; "trichromatic vision";
           "a trichromatic printing process"; "trichromatic staining
           is the staining of tissue samples differentially in three
           colors"; "tricolor plumage"; "a tricolor process in
           photography" [syn: trichromatic, trichrome,
           tricolor]