Breadcrumb Home > Dictionary > Index U ultrasonics: Meaning and Definition of Find definitions for: ul•tra•son•ics Pronunciation: (ul"tru-son'iks), [key] — n. (used with a sing. v.) the branch of science that deals with the effects of sound waves above human perception. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ultrasonic ultrasonography TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: locution Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language