- 1. n. An arc of a circle which is equal to the radius, or the angle measured by such an arc. Source: opted
- 2. n. the unit of plane angle adopted under the Systeme International d'Unites; equal to the angle at the center of a circle subtended by an arc equal in length to the radius (approximately 57.295 degrees) Source: wordnet
- 3. An arc of a circle which is equal to the radius, or the angle measured by such an arc. Source: webster
- 4. An arc of a circle which is equal to the radius, or the anglemeasured by such an arc. Source: adambom
- 5. n:100 n. the unit of plane angle adopted under the Systeme International d'Unites; equal to the angle at the center of a circle subtended by an arc equal in length to the radius (approximately 57.295 degrees) Source: ecdict
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radian
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arcequalanglecircleradiusadoptedapproximatelycenterdegreesinternationallengthmeasuredplanesubtendedunit