## chord (in geometry)

chord (kôrd), in geometry, straight line segment both end points of which lie on the circumference of a circle or other curve; it is a segment of a secant. A chord passing through the center of a circle is a diameter. In the same circle or in equal circles, equal chords subtend equal arcs and equal central angles.

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## chord

chord.
1. Straight line joining two points on an arc.

2. Span of an arch.

3. Diameter of an apse or a semicircular arch.

4. Principal member of a truss, usually one of a pair extending along the top and bottom.

5. Lower straight part of a Belfast or bowstring truss.

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## chord

chord 1 †harmony XV; (mus.) concord, note of a chord XVI; combination in harmony of simultaneous notes XVIII. orig. cord, aphetic of ACCORD.

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## chord

chord. Any simultaneous combination of notes, but usually of not fewer than 3. The use of chords is the basic foundation of harmony.

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## chord

chord 2 †tendon; line joining extremities of an arc XVI; string of musical instrument. refash. of CORD, after L. chorda.

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## chord

chordaboard, abroad, accord, afford, applaud, award, bawd, board, broad, chord, Claude, cord, ford, fraud, gaud, Gawd, hoard, horde, laud, lord, maraud, milord, sward, sword, toward, unawed, unexplored, unrestored, ward •fjord