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- See Also:
- - tach
  - tache
  - tacheo-
  - tacheometer
  - tacheometry
  - tachina fly
  - tachiol
  - tachism
  - tachisme
  - tachistoscope
  - tacho-
  - tachogram
  - tachograph
  - tachometer
  - tachy-
  - tachycardia
  - tachygraph
  - tachygraphy
  - tachylyte
  - tachymeter
  - tachymetry
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tacho-

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WordReference Random House Unabridged Dictionary of American English © 2026

tacho-,

a combining form meaning "speed,'' used in the formation of compound words:tachometer.Cf. tachy-.

akin to tachýs swift combining form representing Greek táchos

Collins Concise English Dictionary © HarperCollins Publishers::

tacho- combining form

speed: tachograph, tachometer

Etymology: from Greek takhos

'tacho-' also found in these entries (note: many are not synonyms or translations):

tachograph - tachogram - tachometer - tachy-

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