## DIFFERENTIAL

### Differential

A differential is a device, usually, but not necessarily, employing gears, which is connected to the outside world by three shafts, chains, or similar, through which it transmits torque and rotation. The gears or other components make the three shafts rotate in such a way that [itex]\scriptstyle a=pb+qc[/itex], where [itex]\scriptstyle a[/itex], [itex]\scriptstyle b[/itex], and [itex]\scriptstyle c[/itex] are the angular velocities of the three shafts, and [itex]\scriptstyle p[/itex] and [itex]\scriptstyle q[/itex] are constants. Often, but not always, [itex]\scriptstyle p[/itex] ...

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### differential

#### Noun

1. the differential gear in an automobile etc
2. a qualitative or quantitative difference between similar or comparable things
3. an infinitesimal change in a variable, or the result of differentiation

#### Adjective

1. of, or relating to a difference
differential characteristics
2. dependent on, or making a difference; distinctive
3. having differences in speed or direction of motion
4. of, or relating to differentiation, or the differential calculus

The above text is a snippet from Wiktionary: differential
and as such is available under the Creative Commons Attribution/Share-Alike License.