Plural of accordion; multiple accordion musical instruments with a keyboard and a bellows that produces sound.
From German Akkordeon (early 1800s), derived from Akkord meaning 'chord.' The word traveled across European languages and into English as the instrument became popular in the 19th century.
The accordion was invented in the 1820s and spread like wildfire because unlike pianos, it was portable and cheap—suddenly traveling musicians, prisoners, and working-class people could make beautiful harmonies. It democratized music!
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