WBW #64

torsion

ORIGIN: A Late Latin word plus an English suffix

DEFINITION:

1: the act of turning or twisting: the state of being twisted: the twisting or wrenching of a body by the exertion of forces tending to turn one end or part about a longitudinal axis while the other is held fast or turned in the opposite direction

2: the limit of the ratio of the angle between the binormals at two points of a curve to the length of the arc joining the points as the length of the arc approaches zero – called also second curvature

3: the reactive torque that an elastic solid exerts by reason by being under torsion
4: the twisting of a body organ on its own axis
SENTENCE: All four definitions of torsion seem to have to do with the bending of an object.
NOTE: This word was the winning word of the ninth National Spelling Bee, which was won by Alma Roach.

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