| 1. |
(noun) a unit of absorbed ionizing radiation equal to 100 ergs per gram of irradiated material |
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Related Words: radioactivity unit |
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| 2. |
(noun) the unit of plane angle adopted under the System 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) |
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Synonyms: radian |
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Related Words: angular unit |
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