Source : Webster's Revised Unabridged Dictionary (1913)

Contrapuntal \Con`tra*pun"tal\, a. [It. contrappunto
   counterpoint. See {Counterpoint}.] (Mus.)
   Pertaining to, or according to the rules of, counterpoint.

Source : WordNet®

contrapuntal
     adj 1: relating to or characteristic of or according to the rules
            of counterpoint; "contrapuntal base"
     2: having two or more independent but harmonically related
        melodic parts sounding together [syn: {polyphonic}] [ant:
        {monophonic}]