chamber music, Kammermusik [G], musique de chambre [F], musica da camera [I], musica cameralis [L]—"Classical Music" for a small ensemble, generally 8 or fewer players with a canonical emphasis on 3-6 players. explore
duo, duet, dueto [S], duetto [I], duett [G]—a work for two instruments; the ensemble itself
solo—a piece or section of a piece featuring a single instrumental part. Often, this implies one instrument alone but may indicate a soloist with accompaniment (e.g. continuo) especially in a section within a larger work for ensemble
triptych, triptyque [F], Triptychon [G]—Work of art consisting of three panels that are hinged. A work of art composed of three separate pieces, usually displayed together side by side, producing one continuous entity.
violin sonata—a multi-movement work for violin and keyboard (or continuo) though there are sonatas for solo violin as well as sonatas in a single movement. While the violin would seem to be the featured instrument, many sonatas starting with the classical period find the piano to be an equal partner in the sense of a chamber work for two players.