Triacid
Pronunciation : Tri*ac"id
Part of Speech : a.
Etymology : [Pref. tri- + acid.] (Chem.)
Definition : Defn: Capable of neutralizing three molecules of a monobasic acid or the equivalent; having three hydrogen atoms which may be acid radicals; -- said of certain bases; thus, glycerin is a triacid base.
Source : Webster's Unabridged Dictionary, 1913