planetary gear

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Definitions from WordNet

Noun planetary gear has 1 sense

planetary gear, epicyclic gear, planet wheel, planet gear - an outer gear that revolves about a central sun gear of an epicyclic train
--₁ is a kind of gear, gear wheel, cogwheel
--₁ is a part of epicyclic train, epicyclic gear train

Definitions from the Web

Planetary Gear

Noun:

A type of gear mechanism composed of one or more outer gears, called planet gears, revolving around a central gear, known as the sun gear.

Example sentence:

The efficiency of a planetary gear allows for smoother and more compact transmission systems.

Adjective:

Referring to or associated with planetary gears.

Example sentence:

The company specializes in the production of high-quality planetary gear systems.

Verb:

To equip or fit with planetary gears.

Example sentence:

The engineers decided to planetary gear the gearbox for increased torque and efficiency.