Link Centre Dictionary

rad

UK/ɹæd/ US/ˈræd/ fairly common slang

noun

1.

a unit of absorbed ionizing radiation equal to 100 ergs per gram of irradiated material

2.

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)

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WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved.