radian

ra·di·an  (rd-n)

n. Abbr. rad

A unit of angular measure equal to the angle subtended at the center of a circle by an arc equal in length to the radius of the circle, approximately 57°1744.6". See Table at measurement.

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[radi(us) + -an.]

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radian [ˈreɪdɪən]

n

(Mathematics & Measurements / Units) an SI unit of plane angle; the angle between two radii of a circle that cut off on the circumference an arc equal in length to the radius. 1 radian is equivalent to 57.296 degrees and π/2 radians equals a right angle Symbol rad

[from radius]

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radian  (rd-n)

A supplementary unit of the International System used in angular measure. One radian is equal to the angle subtended at the center of a circle by an arc equal in length to the radius of the circle, approximately 57°1744.6".

Thesaurus

Noun

1.

radian - 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) rad angular unit - a unit of measurement for angles milliradian - a unit of angular distance equal to one thousandth of a radian

Translations

radian [ˈreɪdɪən] n → radiante m

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radian [ˈreɪdɪən] n → radiante m