/ Dictionary / Index F fluorescence-activated cell sorter: Meaning and Definition of Find definitions for: fluo•res'cence-ac•ti•vat•ed cell' sort"er Pronunciation: (floo-res'uns ak"ti-vā"tid, flô-, flō-). [key] See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. fluorescence fluorescent Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language