trivalence
noun
tri·valence
variants or trivalency
(ˈ)trī+
plural trivalences or trivalencies
: the quality or state of being trivalent
Word History
Etymology
trivalence International Scientific Vocabulary, from trivalent, after such pairs as English present : presence; trivalency from trivalent, after such pairs as English regent : regency; translation of German dreiwertigkeit