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heptasyllable

[hep-tuh-sil-uh-buh l]
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noun
  1. a word or line of verse of seven syllables.
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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. 2018