submicroscopic

submicroscopic definition - medical

sub·mi·cro·scop·ic (sŭbˌmī-krə-skŏpˈĭk)

adjective
Too small to be visible under the most powerful optical microscope.

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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