The Collaborative International Dictionary
Hendecasyllabic
Hendecasyllabic \Hen*dec`a*syl*lab"ic\, a. Pertaining to a line of eleven syllables.
Wiktionary
hendecasyllabic
a. Having eleven syllables. n. A word or line of eleven syllables.
Usage examples of "hendecasyllabic".
She had written versions of the deportment and civics texts in hendecasyllabic couplets, like those used for spelling, but she could not obtain official approval for them.