a fossilized track, trail, burrow, boring, or other structure in sedimentary rock that records the presence or behavior of the organism that made it.
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- trace element,
- tracer bullet
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
the fossilized remains of a track, trail, footprint, burrow, etc, of an organism
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
A fossil consisting of an imprint of or a mark left by an organism, as opposed to physical remains. Trace fossils are produced in soft sediments and include surface tracks, molded impressions left by organisms or tissues that later decayed, and subsurface burrows or tunnelings.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.