Result from Foreign Dictionaries (2 entries found)
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Tetravalent \Te*trav"a*lent\, a. [Tetra- + L. valens, -entis, p.
pr.] (Chem.)
Having a valence of four; tetratomic; quadrivalent.
[1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
tetravalent
adj 1: haveing a valence of four