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[haw-rol-uh-jee, hoh-]
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  1. the art or science of making timepieces or of measuring time.

Origin of horology

1810–20; < Greek hōro- (combining form of hṓra hour) + -logy
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for horology

Historical Examples

  • In any modern work on horology of value, the metric system is used.

    An Analysis of the Lever Escapement

    H. R. Playtner

  • He was not, however, dissuaded from his preoccupation with horology.

  • Vitality, says Huxley, has no more reality than the horology of a clock.

    The Breath of Life

    John Burroughs

  • We now come to consider the date of the next grand step in the progress of Horology,—namely, that of the invention of the clock.

    Time and Time-Tellers

    James W. Benson

  • It will be worth while by way of illustration to point to the assistance given by horology to astronomical and nautical science.

    Time and Time-Tellers

    James W. Benson

British Dictionary definitions for horology


  1. the art or science of making timepieces or of measuring time
Derived Formshorologic (ˌhɒrəˈlɒdʒɪk) or horological, adjective
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

Word Origin and History for horology


science of time, 1819, probably from Greek hora "hour" (see hour) + -logy. Earlier it meant "clock, clock dial" (c.1500), from Latin horologium. Related: Horologist.

Online Etymology Dictionary, © 2010 Douglas Harper

horology in Science


  1. The science of measuring time.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.