n.
The chronology of the earth's history as determined by geologic events.
geochronologic ge'o·chron'o·log'ic (-krŏn'ə-lŏj'ĭk) or ge'o·chron'o·log'i·cal adj.
geochronologically ge'o·chron'o·log'i·cal·ly adv.
geochronologist ge'o·chro·nol'o·gist n.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
