• Webster's Revised Unabridged Dictionary
    • a Hendecasyllabic Pertaining to a line of eleven syllables.
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Century Dictionary and Cyclopedia
    • hendecasyllabic Consisting of eleven syllables: as, a hendecasyllabic line or verse.
    • n hendecasyllabic In prosody, a line or colon (series) consisting of eleven syllables. In ancient metrics the name is especially given to certain frequent logaœdic meters, namely: the alcaic hendecasyllabic , the Phalæcean hendecasyllabic , and the Sapphic hendecasyllabic . This last in the form is the Pindaric hendecasyllabic. An Archilochian hendecasyllabic is an iambic trimeter catalectic . An example of Phalæcean hendecasyllabics in English is
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In literature:

Come, Hendecasyllabics, many as may All hither, every one that of you be!
"The Carmina of Caius Valerius Catullus" by Caius Valerius Catullus
Catullus is Martial's chief model for hendecasyllabics and choliambics.
"The Student's Companion to Latin Authors" by George Middleton
The Italian hendecasyllabic, the French Alexandrian, the English heroic iambic, are obvious examples.
"Renaissance in Italy: Italian Literature" by John Addington Symonds