Also found in: Thesaurus, Encyclopedia, Wikipedia.
See index fossil.
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.
Switch to new thesaurus
|Noun||1.||guide fossil - a fossil known to have lived in a particular geologic age that can be used to date the rock layer in which it is found|
fossil - the remains (or an impression) of a plant or animal that existed in a past geological age and that has been excavated from the soil
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.