பொருள் : A unit of absorbed ionizing radiation equal to 100 ergs per gram of irradiated material.
பொருள் : 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).
ஒத்த சொற்கள் : radian