Cite
 

Meaning of quadrivalent

quad•ri•va•lent

Pronunciation: (kwod"ru-vā'lunt, kwo-driv'u-), [key]
— adj. Chem.
  1. having a valence of four; tetravalent.
  2. exhibiting four different valences, as antimony with valences of 5, 4, 3, and −3.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.