Quadrivalent
Pronunciation : Quad*riv"a*lent
Part of Speech : a.
Etymology : [Quadri- + L. valens, -entis, p. pr. See Valence.] (Chem.)
Definition : Defn: Having a valence of four; capable of combining with, being replaced by, or compared with, four monad atoms; tetravalent; -- said of certain atoms and radicals; thus, carbon and silicon are quadrivalent elements.
Source : Webster's Unabridged Dictionary, 1913