/ Dictionary / Index D diamagnet: Meaning and Definition of Find definitions for: di•a•mag•net Pronunciation: (dī'u-mag"nit), [key] — n. Physics. a diamagnetic substance. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: diamagnet (Thesaurus) diam. diamagnetic Related Content Daily Word Quiz: belligerent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language