Definition of pentasyllabic in English:

pentasyllabic

adjective

  • Consisting of five syllables.

Origin

Late 18th century; earliest use found in Thomas Gray (1716–1771), poet and literary scholar. From penta- + syllabic, after monosyllabic, disyllabic, trisyllabic, etc.

Pronunciation

pentasyllabic

/ˌpɛntəsɪˈlabɪk/