/ Dictionary / Index F folium: Meaning and Definition of Find definitions for: fo•li•um Pronunciation: (fō'lē-um), [key] — pl. -li•a a thin leaflike stratum or layer; a lamella. a loop; part of a curve terminated at both ends by the same node. Equation: + y = 3axy. x Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: folium (Thesaurus) folio verso* folivore Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language