tuba (n.)youdaoicibaDictYouDict[tuba 词源字典]
1852 in reference to a modern, large, low-pitched brass musical instrument, from French tuba, from Latin tuba (plural tubae) "straight bronze war trumpet" (as opposed to the crooked bucina), related to tubus (see tube (n.)).[tuba etymology, tuba origin, 英语词源]