• synonyms


  1. an instrument that uses scattering phenomena to detect the position of objects too small to be seen by an ordinary microscope.
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Origin of ultramicroscope

First recorded in 1905–10; ultra- + microscope
Related formsul·tra·mi·cro·scop·ic [uhl-truh-mahy-kruh-skop-ik] /ˌʌl trəˌmaɪ krəˈskɒp ɪk/, ul·tra·mi·cro·scop·i·cal, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for ultramicroscope

Historical Examples of ultramicroscope

  • What I saw through that ultramicroscope was not an unproven theory, but a fact.

    The Girl in the Golden Atom

    Raymond King Cummings

  • The above action can be readily demonstrated in vitro by means of the ultramicroscope.

  • Colloidal particles are, however, generally visible under the Zigmondy "ultramicroscope."

    The Chemistry of Plant Life

    Roscoe Wilfred Thatcher

British Dictionary definitions for ultramicroscope


  1. a microscope used for studying colloids, in which the sample is strongly illuminated from the side and colloidal particles are seen as bright points on a dark backgroundAlso called: dark-field microscope
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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

ultramicroscope in Medicine


  1. A microscope with high-intensity illumination used to study very minute objects.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.