submicroscopic[sub′mī krə skäp′ik]
submicroscopic definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
too small to be seen through a microscope
submicroscopic definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Too small to be resolved by an optical microscope.
- subˌmi·cro·scopˈi·cal·ly adverb
submicroscopic - Medical Definition
Too small to be visible under the most powerful optical microscope.