AskDefine | Define rad

Dictionary Definition



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) [syn: radian]

User Contributed Dictionary


  • a UK /ɹæd/, /r

Extensive Definition

Rad may mean:

Three letter acronym

rad in German: Rad (Begriffsklärung)
rad in Spanish: Rad
rad in Esperanto: RAD
rad in French: RAD
rad in Italian: RAD
rad in Dutch: Rad
rad in Japanese: RAD
rad in Polish: Rad
rad in Russian: Рад
rad in Swedish: Rad
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