reduction gear

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Definitions from WordNet

Noun reduction gear has 1 sense

reduction gear - gearing that reduces an input speed to a slower output speed
--₁ is a kind of gearing, gears, geartrain, power train, train

Definitions from the Web

reduction gear

A reduction gear is a type of mechanical device used to decrease the rotational speed and increase the torque of a power source.

Examples:

The reduction gear in the car's transmission allowed for better control while driving uphill.
Industrial machines utilize reduction gears to convert high-speed rotations into slower and more powerful motions.
This remote-controlled boat is equipped with a reduction gear system that provides precise and steady movements in the water.