rad
definition: the unit of plane angle adopted under the Systeme International d'Unites
example: equal to the angle at the center of a circle subtended by an arc equal in length to the radius (approximately 57.295 degrees)
speech part: noun
synonyms:
radian
definition: a unit of absorbed ionizing radiation equal to 100 ergs per gram of irradiated material
example:
speech part: noun
synonyms: