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tacho-

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  1. a combining form meaning “speed,” used in the formation of compound words: tachometer.
Compare tachy-.

Origin of tacho-

combining form representing Greek táchos; akin to tachýs swift
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for tacho-

tacho-

combining form
  1. speedtachograph; tachometer

Word Origin

from Greek takhos
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012