Category:Triatomic

Tri`a*tom"ic, a. Etym: [pref. tri- + atomic.] (chem.) (a) having three atoms; -- said of certain elements or radicals. (b) having a valence of three; trivalent; sometimes, in a specific Sense, having three hydroxyl groups, whether acid or basic; thus, Glycerin, glyceric acid, and tartronic acid are each triatomic.