n. (Chem.) The quality or state of being quadrivalent; tetravalence. [ 1913 Webster ]
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;
n. A female rival. [ Obs. ] Richardson. [ 1913 Webster ]
n. (Chem.) The quality or state of being trivalent. [ 1913 Webster ]
a. [ Pref. tri- + L. valens, -entis, p. pr. See Valence. ] (Chem.) Having a valence of three; capable of being combined with, substituted for, or compared with, three atoms of hydrogen; -- said of triad atoms or radicals; thus, nitrogen is trivalent in ammonia. [ 1913 Webster ]
a. Having no rival; without a competitor; peerless.