chord
US /kɔːrd/
UK /kɔːrd/
1.
a group of (typically three or more) notes sounded together, as a basis of harmony.
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The song began with a simple piano chord.
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He strummed a few chords on his guitar.
2.
a straight line segment whose endpoints both lie on the circle.
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In geometry, a chord connects two points on a curve.
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The diameter is the longest chord of a circle.