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radian
[ rey-dee-uhn ]
noun
Mathematics.
- the measure of a central angle subtending an arc equal in length to the radius: equal to 57.2958°. : rad
radian
/ ˈɪɪə /
noun
- 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 rad
radian
- 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°17′44.6″.
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Word History and Origins
Origin of radian1
C19: from radius
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Example Sentences
Examples have not been reviewed.
He was diagnosed with radial tunnel syndrome and underwent a procedure to decompress the radian nerve in his right arm that July.
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A representative of the former star of “Glee” said Saturday that Reich, president of clothing company AYR, proposed with a 4-carat elongated radian cut ring that he personally helped design.
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One big thing tau fixes is radian angles.
From
You mention the regrettable practice of referring to torque units in joules per radian.
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For example, radians could be made a new SI unit, and the unit 1 could be formally coupled with notation that includes the type of quantity that it represents.
From
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