A unit or group of three lines of verse which are rhymed together or have a rhyme scheme that interlaces with an adjoining tercet Sidelight: The sestet, or second part of a Petrarchan sonnet, often consists of two tercets Sidelight: A tercet is used as an envoi in a sestina (See also Terza Rima)
{i} group or set of three lines of verse (often rhyming); triplet, group of three notes that have the same time value as two regular notes (Music)