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 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for chrono-


before a vowel chron-

combining form

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

Medical definitions for chrono-



The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.