/ Dictionary / Index U ultramicroscope: Meaning and Definition of Find definitions for: ul•tra•mi•cro•scope Pronunciation: (ul"tru-mī'kru-skōp"), [key] — n. an instrument that uses scattering phenomena to detect the position of objects too small to be seen by an ordinary microscope. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ultramicroscope (Thesaurus) ultramicrometer ultramicroscopy Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language