/ Dictionary / Index K Klebs-Löffler bacillus: Meaning and Definition of Find definitions for: Klebs'-Löf'fler bacil"lus Pronunciation: (klebz'lef'lur Ger. klāps'lœf'lur), [key] a bacterium, Corynebacterium diphtheriae, which causes diphtheria. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. klebsiella Klee 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