<p><strong>Noun</strong></p><ul><li>Prosody. A short poem of fixed form, consisting of 13 or 10 lines on two rhymes and having the opening words or phrase used in two places as an unrhymed refrain.</li><li>A 13th-century monophonic song form consisting of two phrases, each repeated several times, and occurring in the 14th and 15th centuries in polyphonic settings.</li><li>A 17th-century musical form consisting of a refrain alternating with contrasting couplets, developing in the 18th century into the sonata-rondo form.</li></ul>