/ Dictionary / Index J Juventa Fons: Meaning and Definition of Find definitions for: Ju•ven•ta Fons Pronunciation: (y-ven'tä fons'), [key] an area in the southern hemisphere of Mars, appearing as a dark region when viewed through a telescope. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. juvenilize juxtapose 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