| n. | 1. | a unit of measurement of the amount of ionizing radiation absorbed by an object, equal to an energy of 100 ergs per gram of irradiated material (equal to 0.01 gray). |
| imp. & p. | 1. |
| Noun | 1. | rad - a unit of absorbed ionizing radiation equal to 100 ergs per gram of irradiated material |
| 2. | 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) Synonyms: radian |
| (programming) | RAD - Rapid Application Development. |