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Monochord

noun

Noun

1
A musical instrument for experimenting with the mathematical relations of musical sounds, consisting of a single string stretched between two bridges, one or both of which can be moved, and which stand upon a graduated rule for the purpose of changing and measuring the length of the part of the string between them.
"If a musician were going to give a lecture upon the mathematical part of his art, he would find a very elegant substitute for the monochord in the Chinese kin."
2
A stringed instrument with only one string.
3
A bass note on a piano that has a single string.

Learned borrowing from Latin monochordon, itself borrowed from Ancient Greek μονόχορδον (monókhordon). By surface analysis, mono- + chord.

Unscramble this word: monochord