tacho-

American  

1. a combining form meaning “speed,” used in the formation of compound words.

   tachometer.

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tacho- British  

combining form

1. speed

   tachograph

   tachometer

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Usage

What does tacho- mean? Tacho- is a combining form used like a prefix meaning “speed.” It is especially used in scientific terms. Tacho- comes from the Greek táchos, meaning “speed.”Related to tacho- is tacheo-, as in tacheometry, and tachy-, as in tachygraph. Want to know more? Read our articles Words That Use tacheo- and Words That Use tachy-.

Etymology

Origin of tacho-

Combining form representing Greek táchos; akin to tachýs swift