word-forming element meaning "speed," from Latinized form of Greek takho-, combining form of takhos "speed, swiftness, fleetness, velocity," related to takhys "swift," of unknown origin.
Entries linking to tacho-
tachometer n.
speed-measuring instrument, 1810, coined by inventor, Bryan Donkin, from tacho- "speed" + -meter. Related: Tachometry.