1) Antibiotic 2) Antibiotic drug 
== Synthesis == In order for pyocyanin to be synthesized by P. aeruginosa, two specific genes must be functional. MvfR is a gene which produces a transcription factor which activates phnAB genes. These genes produce the molecule quinolone which then regulates operons 1 and 2 of phzRABCDEFG which are key to the synthesis of phenazine. The synthesis...
• (n.) 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).
<microbiology> Blue green phenazine pigment produced by Pseudomonas aeruginosa, has antibiotic properties. ... (18 Nov 1997) ... 
(pi″o-si´ә-nin) a blue-green pigment produced by Pseudomonas aeruginosa; it gives the color to blue pus.
Blue-green phenazine pigment produced by Pseudomonas aeruginosa ; has antibiotic properties.
Py`o·cy'a·nin noun [ Greek ... pus + ... dark blue.] (Physiol. (Chemistry) 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 ). 
[n] - a toxic blue crystalline antibiotic found in green pus
blue pigments produced by some strains of Pseudomonas aeruginosa
noun a toxic blue crystalline antibiotic found in green pus