/ Dictionary / Index R rydberg: Meaning and Definition of Find definitions for: ryd•berg Pronunciation: (rid'bûrg), [key] — n. Physics. a unit of energy used in atomic physics, equal to 13.606 electron-volts. Abbr.: ry Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rydberg (Thesaurus) Rybinsk Ryder Related Content Daily Word Quiz: nonchalant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language