Plural of harmonica; small handheld musical instruments with a series of metal reeds that produce sound when air is blown or drawn through them.
From harmonica (from harmonic, emphasizing the harmonic tones the instrument produces) + plural -s. The instrument was invented in 1821 and named to reflect its harmonic capabilities.
The harmonica is one of the cheapest musical instruments ever made, yet legendary musicians like Bob Dylan and John Lennon made it a rock and roll staple—proving that humble tools can create profound music.
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