/ Dictionary / Index M microscope: Meaning and Definition of Find definitions for: mi•cro•scope Pronunciation: (mī'kru-skōp"), [key] — n. an optical instrument having a magnifying lens or a combination of lenses for inspecting objects too small to be seen or too small to be seen distinctly and in detail by the unaided eye. (cap.)the constellation Microscopium. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: microscope (Thesaurus) micros. microscopic Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language