Source : Webster's Revised Unabridged Dictionary (1913)

Dissyllable \Dis*syl"la*ble\ (?; 277), n. [F. dissyllabe, L.
   disyllabus, adj., of two syllables, fr. Gr. ?; di- = di`s-
   twice + ? syllable. See {Syllable}.]
   A word of two syllables; as, pa-per.

Source : WordNet®

dissyllable
     n : a word having two syllables [syn: {disyllable}]