heptasyllable

[ hep-tuh-sil-uh-buh l ]
/ ˈhɛp təˌsɪl ə bəl /

noun

a word or line of verse of seven syllables.

Origin of heptasyllable

First recorded in 1750–60; hepta- + syllable
Related formshep·ta·syl·lab·ic [hep-tuh-si-lab-ik] /ˌhɛp tə sɪˈlæb ɪk/, adjective, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019