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Noun: planetary gear
  1. An outer gear that revolves about a central sun gear of an epicyclic train
    - epicyclic gear, planet wheel, planet gear

Derived forms: planetary gears

Type of: cogwheel, gear, gear wheel, geared wheel

Part of: epicyclic gear train, epicyclic train

Encyclopedia: Planetary gear

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planetesimal hypothesis
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plane-tree family
plangency
plangent