/ Dictionary / Index A Arcas: Meaning and Definition of Find definitions for: Ar•cas Pronunciation: (är'kus), [key] — n. Class. Myth. a son of Zeus and Callisto, the ancestor of the Arcadians who was set among the stars with his mother as the Little Bear and the Great Bear respectively. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: arcas (Thesaurus) Arcaro Arcata Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language