Gear wheel

/ɡɪɚ ʍil/ noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A wheel with a toothed rim, intended to engage with others, or similar equipment, to form a gear.

    "Holonym: gearset"

  2. 2
    a toothed wheel that engages another toothed mechanism in order to change the speed or direction of transmitted motion wordnet

Etymology

From gear + wheel.