/ Dictionary / Index A Arrhenius: Meaning and Definition of Find definitions for: Ar•rhe•ni•us Pronunciation: (är-rā'nē-oos"), [key] 1859–1927, Swedish physicist and chemist: Nobel prize for chemistry 1903. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: arrhenius (Thesaurus) arrgt. arrhenotoky 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