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| a radiation of high penetrating power that originates in outer space and consists partly of high-energy atomic nuclei |
| a wave produced by the acceleration of an electric charge and propagated by the periodic variation of intensities |
| angular acceleration | |
| —n | |
| 1. | the rate of change of angular velocity |
| 2. | astronautics the acceleration of a space vehicle around an axis |
| angular acceleration (āng'gyə-lər) Pronunciation Key
The rate of change of angular velocity with respect to time. Angular acceleration is measured in revolutions per minute squared or in radians per second squared. |