SESTET

Ses‐tet″ (?), n. [[It. sestetto, fr. sesto sixth, L. sextus, fr. sex six.]] 1. 1. (Mus.) A piece of music composed for six voices or six instruments; a sextet; — called also sestuor. [Written also sestett, sestette.]
2. 2. (Poet.) The last six lines of a sonnet.