tetravalence
noun
tet·ra·valence
¦te‧trə+
variants or tetravalency
"+
: the quality or state of being tetravalent
the tetravalence of the carbon atom
Word History
Etymology
tetravalence International Scientific Vocabulary, from tetravalent, after such pairs as English present : presence; tetravalency from tetravalent, after such pairs as English president : presidency