sestet

n. [ It. sestetto, fr. sesto sixth, L. sextus, fr. sex six. ] 1. (Mus.) A piece of music composed for six voices or six instruments; a sextet; -- called also sestuor. [ Written also sestett, sestette. ] [ 1913 Webster ]

2. (Poet.) The last six lines of a sonnet. [ 1913 Webster ]