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submicroscopic

or submicroscopical

[suhb-mahy-kruh-skop-ik] /ˌsʌb maɪ krəˈskɒp ɪk/
adjective
1.
too small to be seen through a microscope.
Origin of submicroscopic
Related forms
submicroscopically, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for submicroscopic
Historical Examples
  • Very few, if any, higher life forms existed that did not have some sort of submicroscopic parasite afflicting them.

    Star Surgeon Alan Nourse
  • These colloid substances have a submicroscopic or micellian structure; they are web-like, porous and absorb water eagerly.

    The Natural History of Clay Alfred B. Searle
  • In any case, a microscope would have done Brown little good in trying to detect the submicroscopic beings of the Rell.

    The Hitch Hikers Vernon L. McCain
British Dictionary definitions for submicroscopic

submicroscopic

/ˌsʌbmaɪkrəˈskɒpɪk/
adjective
1.
too small to be seen through an optical microscope
Derived Forms
submicroscopically, adverb
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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submicroscopic in Medicine

submicroscopic sub·mi·cro·scop·ic (sŭb'mī-krə-skŏp'ĭk)
adj.
Too small to be visible under the most powerful optical microscope.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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