| pyocyanin | (n) a toxic blue crystalline antibiotic found in green pus |
| Pyocyanin | n. [ Gr. &unr_; pus + &unr_; dark blue. ] (Physiol. Chem.) A blue coloring matter found in the pus from old sores, supposed to be formed through the agency of a species of bacterium (Bacillus pyocyaneus). [ 1913 Webster ] |