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Noun: worm gear
  1. Gear consisting of a shaft with screw thread (the worm) that meshes with a toothed wheel (the worm wheel); changes the direction of the axis of rotary motion

Derived forms: worm gears

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

Encyclopedia: Worm gear

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world-shaking
world-shattering
world-weariness
world-weary
worldwide
world-wide
worm
worm family
worm fence
worm fish
worm gear
worm genus
worm lizard
worm salamander
worm snake
worm wheel
wormcast
worm-eaten
wormhole
Wormian bone
wormlike