复数：tubas 复数：tubae
1.【乐】大号,低音大喇叭;(风琴的)低音大号音栓
2.(古罗马的)喇叭
1.a large musical instrument that is a curved metal tube with a wide open end. You play it by blowing into it as you press buttons on the top. A tuba is a brass instrument.
tubae