tach

Definitions of tach
  1. noun
    measuring instrument for indicating speed of rotation
    synonyms: tachometer
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    types:
    tachograph
    a tachometer that produces a graphical record of its readings; used to record the speed and duration of trips in a motor vehicle
    type of:
    measuring device, measuring instrument, measuring system
    instrument that shows the extent or amount or quantity or degree of something
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