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Definitions of rad:
- noun: a unit of absorbed ionizing radiation equal to 100 ergs per gram of irradiated material
- noun: 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)
- name: A surname (very rare: popularity rank in the U.S.: #37083)
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