Driven Gears - Gear Terminology
The gear that is rotated by the driving gear amongst a pair of gears that engage each other is called the driven gear.
In the case of a pair of external gears, the direction of rotation of the driving gear and the driven gear is opposite. When the external gear meshes with the internal gear, the direction of rotation is the same.
If the number of teeth on the driving gear is less than the number of teeth on the driven gear, the output torque will be greater, while if the number of teeth on the driving gear is greater than the number of teeth on the driven gear, the output torque will be less.
For more information on the relationship between the number of teeth of the driving gear and the driven gear and the speed transmission ratio, please refer to the page on driving gears.