Webster's Revised Unabridged Dictionary · 1913

Radian

Radian (rā"di*an) , noun

[From Radius.]

(Mathematics) An arc of a circle which is equal to the radius, or the angle measured by such an arc.

Text from the public-domain GNU Collaborative International Dictionary of English, derived from Webster's Revised Unabridged Dictionary (1913). Definitions marked with were added by later GCIDE contributors and are not in the original 1913 edition.

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