tuba
tu.ba \'t(y)u:-b*\ n [It, fr. L, trumpet] 1: a large low-pitched brass wind instrument; esp : one with a coni cal bore and cup-shaped mouthpiece 2: a powerful organ reed stop of 8-foot pitch
Webster's English Dictionarytu.ba \'t(y)u:-b*\ n [It, fr. L, trumpet] 1: a large low-pitched brass wind instrument; esp : one with a coni cal bore and cup-shaped mouthpiece 2: a powerful organ reed stop of 8-foot pitch