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

Dutch: rad
Polish: rad

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).

synonym: radian.

Dutch: Radian, radiaal, radial
Polish: rad, radian