Vernier

Noun

  • A secondary control input with finer control than the primary, or coarse, input; for example the vernier frequency tuning knob on a radio.
  • A secondary scale with finer graduations than the primary scale of a measuring device; the vernier measures between graduations of the larger scale.
  • (physics) A secondary system of force application for the attitude control of a spacecraft; for example a vernier thruster.

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