euphonium
/juːˈfəʊnɪəm
/noun
A valved brass musical instrument of tenor pitch, resembling a small tuba.Heckelphone, ondes-martenot, tubax, contrabassoon, serpent, octobasse, flugelhorn, euphonium are examples of musical instruments whose sex appeal does not live up to their exotic sounding names....
- The euphonium differs from the B baritone saxhorn at the same pitch in being considerably wider in bore.
- John also played the euphonium and the tuba with the Wiltshire Constabulary's band and the Wessex Wind Band.
Origin
Mid 19th century: from Greek euphōnos 'having a pleasing sound' + -ium.