Wrest, n.
1. The act of wresting; a wrench; a violent twist; hence, distortion; perversion.
2. Active or moving power. [Obs.]
3. A key to tune a stringed instrument of music.
The minstrel . . . wore round his neck a silver chain, by which hung the wrest, or key, with which he tuned his harp. --Sir W. Scott.
4. A partition in a water wheel, by which the form of the buckets is determined.
Wrest pin Piano Manuf., one of the pins around which the ends of the wires are wound in a piano. --Knight.
Wrest plank Piano Manuf., the part in which the wrest pins are inserted.
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