The Collaborative International Dictionary
Quadrivalent
Quadrivalent \Quad*riv"a*lent\, a. [Quadri- + L. valens, -entis, p. pr. See Valence.] (Chem.) 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.
Wiktionary
quadrivalent
a. (context chemistry English) Having a valence of four. n. (context genetics English) Any quadrivalent chromosome.