an instrument for measuring distance traveled, as by an automobile.

1785–95, Americanism; variant of hodometer < Greek hodó(s) way + -meter

odometrical [oh-duh-me-tri-kuhl] , adjective
odometry, noun
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World English Dictionary
odometer (ɒˈdɒmɪtə, əʊ-)
(US), (Canadian) Also called: mileometer a device that records the number of miles that a bicycle or motor vehicle has travelled
[C18 hodometer, from Greek hodos way + -meter]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1791, from Fr. odomètre (1724), from Gk. hodos "way" (see cede) + metron "measure" (see meter (2)). First recorded in writings of Thomas Jefferson.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
odometer   (ō-dŏm'ĭ-tər)  Pronunciation Key 
An instrument for indicating the distance traveled by a vehicle, typically by measuring the number of rotations of a wheel or fan whose rate of rotation depends on the speed of the vehicle. Compare speedometer.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Watching your odometer roll over into six figures is a momentous occasion,
  especially if you drive an electric vehicle.
Be sure the mileage indicated on your odometer is correct when buying a used
Odometer fraud occurs when someone illegally rolls back or misrepresents the
  mileage reading on a vehicle.
Vehicle odometer tampering suspect arrested buyers.
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