DECELERATION
deceleration
Noun
- The act or process of decelerating.
- The rocket is now in deceleration.
- The amount by which a speed or velocity decreases (and so a scalar quantity or a vector quantity).
- The brakes produce a deceleration of 10 metres per second per second.
The above text is a snippet from Wiktionary: deceleration
and as such is available under the Creative Commons Attribution/Share-Alike License.