submicroscopical

submicroscopic

[suhb-mahy-kruh-skop-ik]
adjective
too small to be seen through a microscope.
Also, submicroscopical.


Origin:
sub- + microscopic

submicroscopically, adverb
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World English Dictionary
submicroscopic (ˌsʌbmaɪkrəˈskɒpɪk)
 
adj
too small to be seen through an optical microscope
 
submicro'scopically
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

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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