/ Dictionary / Index O oscilloscope: Meaning and Definition of Find definitions for: os•cil•lo•scope Pronunciation: (u-sil'u-skōp"), [key] — n. Elect. a device that uses a cathode-ray tube or similar instrument to depict on a screen periodic changes in an electric quantity, as voltage or current. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: oscilloscope (Thesaurus) oscillometer oscine Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language