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microfossil

[mahy-kroh-fos-il] /ˌmaɪ kroʊˈfɒs ɪl/
noun
1.
a fossil so small that it can be studied and identified only with a microscope.
Compare macrofossil.
Origin
1920-1925
1920-25; micro- + fossil
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for microfossils
  • These phosphatic microfossils are now termed conodont elements to avoid confusion.
British Dictionary definitions for microfossils

microfossil

/ˈmaɪkrəʊˌfɒsəl/
noun
1.
a fossil generally less than 0.5 millimetre in size, such as a protozoan, bacterium, or pollen grain
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
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microfossils in Science
microfossil
  (mī'krō-fŏs'əl)   
A microscopic fossil, as of a pollen grain or unicellular organism.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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