/ Dictionary / Index L leukopenia: Meaning and Definition of Find definitions for: leu•ko•pe•ni•a Pronunciation: (l"ku-pē'nē-u), [key] — n. Med. a decrease in the number of white blood cells in the blood. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: leukopenia (Thesaurus) leukopedesis leukoplakia Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language