harmonica
noun🔊/hɑːˈmɒnɪkə/
🔊/hɑːrˈmɑːnɪkə/
(British English or North American English, old-fashioned mouth organ)
a small musical instrument that you hold against your lips and play by blowing or taking air in through it 口琴 Word Originmid 18th cent.: from Latin, feminine singular or neuter plural of harmonicus ‘musical’ from Greek harmonikos, from harmonia ‘joining, concord’, from harmos ‘joint’.