chrono-
(word root) timeAbused, Confused, & Misused Words by Mary Embree Copyright © 2007, 2013 by Mary Embree
chrono-
or chron-
[From Greek khronos, time.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
chrono-
or before a vowel chron-
combining formindicating time: chronology; chronometer.
[from Greek khronos time]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
chrono-
a combining form meaning “time”: chronometer.
Also, esp. before a vowel, chron-.[< Greek, comb. form of chrónos]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.