a combining form meaning “time,” used in the formation of compound words: chronometer.
Also especially before a vowel, chron-.
Origin of chrono-
< Greek, combining form of chrónos
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
before a vowel chron-
indicating timechronology; chronometer
Word Origin for chrono-
from Greek khronos time
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
before vowels chron-, word-forming element meaning "time," from Latinized form of Greek khrono-, comb. form of khronos "time, a defined time, a lifetime, a season, a while," which is of uncertain origin.
Online Etymology Dictionary, © 2010 Douglas Harper
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.