/ Dictionary / Index F Fornax: Meaning and Definition of Find definitions for: For•nax Pronunciation: (fôr'naks), [key] — gen. For•nac•is the Furnace, a small southern constellation south of Cetus and Eridanus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: fornax (Thesaurus) formyl group fornent Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language