/ Dictionary / Index A Arcaro: Meaning and Definition of Find definitions for: Ar•ca•ro Pronunciation: (är-kâr'ō), [key] — n. (Eddie), born 1916, U.S. jockey. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. arcanum arcanorum* Arcas Related Content Daily Word Quiz: dissonant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language