/ Dictionary / Index F feline leukemia virus: Meaning and Definition of Find definitions for: fe'line leuke'mia vi"rus Pronunciation: [key] a retrovirus, mainly affecting cats, that depresses the immune system and leads to opportunistic infections, lymphosarcoma, and other disorders. Abbr.: FeLV, FLV Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. feline distemper Felipe Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language