The Collaborative International Dictionary
Dissyllabic
Dissyllabic \Dis`syl*lab"ic\ (d[i^]s`s[i^]l*l[a^]b"[i^]k), a.
Consisting of two syllables only; as, a dissyllabic foot in
poetry.
--B. Jonson.
Wiktionary
dissyllabic
a. (archaic form of disyllabic English)