pyocyanin
noun
pyo·cy·a·nin
ˌpī-ō-ˈsī-ə-nən 
variants
or pyocyanine
: a toxic blue crystalline pigment C13H10N2O that is formed in the metabolism of a bacterium of the genus Pseudomonas (P. aeruginosa), gives a bluish tint to pus infected with this organism, is a quinone imine related to phenazine, and has antibiotic activity especially toward gram-positive bacteria
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“Pyocyanin.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/pyocyanin. Accessed 23 Nov. 2024.
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