hendecasyllabic

adjective

hen·​deca·​syl·​lab·​ic (ˌ)hen-ˌde-kə-sə-ˈla-bik 

: consisting of 11 syllables or composed of verses of 11 syllables

hendecasyllabic noun

hendecasyllable

hen-ˈde-kə-ˌsi-lə-bəl 

(ˌ)hen-ˌde-kə-ˈsi-

noun

Word History

Etymology

Latin hendecasyllabus, from Greek hendeka eleven (from hen-, heis one + deka ten) + syllabē syllable — more at same, ten

First Known Use

1704, in the meaning defined above