sestet

noun

1. Prosody. the last six lines of a sonnet in the Italian form, considered as a unit.Compare octave(def 4a).
2. sextet(def 2).

noun

1. prosody the last six lines of a Petrarchan sonnet
2. prosody any six-line stanza
3. another word for sextet (def. 1)

n.1801, from Italian sestetto, diminutive of sesto “sixth,” from Latin sextus (see Sextus).