/ Dictionary / Index E Eridanus: Meaning and Definition of Find definitions for: E•rid•a•nus Pronunciation: (i-rid'n-us), [key] — gen. -a•ni the River, a large southern constellation between Cetus and Orion, containing the bright star Achernar. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: eridanus (Thesaurus) Eric the Red Eridu Related Content Daily Word Quiz: divulge Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language