/ Dictionary / Index P pneumobacillus: Meaning and Definition of Find definitions for: pneu•mo•ba•cil•lus Pronunciation: (n"mō-bu-sil'us, ny"-), [key] — pl. -cil•li a bacterium, Klebsiella pneumoniae, causing a type of pneumonia and associated with certain other diseases, esp. of the respiratory tract. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pneumo- pneumococcus Related Content Daily Word Quiz: hale Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language