/ Dictionary / Index U ultramicroscopy: Meaning and Definition of Find definitions for: ul•tra•mi•cros•co•py Pronunciation: (ul"tru-mī-kros'ku-pē, -mī'kru-skō"pē), [key] — n. the use of the ultramicroscope. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ultramicroscope ultramicrotome Related Content Daily Word Quiz: reticent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language