basset-hornMus.|ˈbæsɪthɔːn| [translation of F. cor de bassette, It.corno di bassetto; see bassetto.] A tenor clarinet, of somewhat greater compass than the ordinary clarinet. 1835in Penny Cycl.1880in Grove Dict.Mus. I. 151/1 Mendelssohn..two concert-pieces for clarinet and bassethorn.