— quadrivalence, quadrivalency , n. — quadrivalently , adv.
/kwod'reuh vay"leuhnt, kwo driv"euh-/ , adj. Chem.
1. having a valence of four; tetravalent.
2. exhibiting four different valences, as antimony with valences of 5, 4, 3, and -3.
[ 1860-65; QUADRI- + -VALENT ]