Definition of polysyllabicism in English:

polysyllabicism

Pronunciation /ˌpɒlɪsɪˈlabɪsɪz(ə)m/

noun

rare
  • Polysyllabic or abstruse style.

Origin

Early 19th century; earliest use found in William Taylor (1765–1836), reviewer and translator. From polysyllabic + -ism.