bombardon
bom.bar.don \ba:m-'ba:rd-*n, 'ba:m-b*r-d*n\ n [F, fr. It bombardone] 1: the bass member of the shawm family 2: a bass tuba
Webster's English Dictionarybom.bar.don \ba:m-'ba:rd-*n, 'ba:m-b*r-d*n\ n [F, fr. It bombardone] 1: the bass member of the shawm family 2: a bass tuba