micro-motor
nounUK /ˈmaɪ.krəʊ ˈməʊ.tə/
US /ˈmaɪ.kroʊ ˈmoʊ.tɚ/
A micro-motor is a very tiny machine that makes small things move.
The toy car uses a micro-motor to spin its wheels.
OTHER MEANINGS
2. A small electric motor used in medical devices such as drills and pumps.
The dentist's tool is powered by a precise micro-motor.
3. A tiny motor built into a smartphone to make it vibrate.
A micro-motor inside the phone creates the buzz when a message arrives.
4. A very small motor used in model airplanes and drones.
He replaced the micro-motor in his drone after it stopped spinning.