Found 2 items, similar to trigonal.
English → English (WordNet) Definition: trigonal trigonal adj : having three-fold symmetry [syn: rhombohedral]
English → English (gcide) Definition: Trigonal Trigonid \Tri"go*nid\ [Webster 1913 Suppl.] Trigonal \Trig"o*nal\, a. Having three angles, or corners; triangular; as, a trigonal stem, one having tree prominent longitudinal angles. [1913 Webster]