# radius of curvature

- the absolute value of the reciprocal of the curvature at a point on a curve.

Compare circle of curvature.

## Origin of radius of curvature^{}

First recorded in 1745–55

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# radius of curvature

- the absolute value of the reciprocal of the curvature of a curve at a given point; the radius of a circle the curvature of which is equal to that of the given curve at that pointSee also centre of curvature

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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