Py`o*cy"a*nin (?), n. [Gr. pus + 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).
Pseudomonas aeruginosa C
13H
10N
2O
© Webster 1913.