'Trivalent' definitions:
Definition of 'trivalent'
From: WordNet
adjective
Having a valence of three
Definition of 'Trivalent'
From: GCIDE
- Trivalent \Triv"a*lent\, a. [Pref. tri- + L. valens, -entis, p. pr. See Valence.] (Chem.) Having a valence of three; capable of being combined with, substituted for, or compared with, three atoms of hydrogen; -- said of triad atoms or radicals; thus, nitrogen is trivalent in ammonia. [1913 Webster]