What's the difference between aeruginous and verdigris?

Aeruginous

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Definition:

• (a.) Of the nature or color of verdigris, or the rust of copper.

Example Sentences:

• (1) The authors report on a case of retinitis septica Roth in a 27-year-old pregnant woman with septic pyelonephritis caused by enterobacter aerugines.

Verdigris

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Definition:

• (n.) A green poisonous substance used as a pigment and drug, obtained by the action of acetic acid on copper, and consisting essentially of a complex mixture of several basic copper acetates.
• (n.) The green rust formed on copper.
• (v. t.) To cover, or coat, with verdigris.

Example Sentences:

• (1) It is, however, now clear that David Cameron’s one-time “ vote blue, go green ” pitch in opposition was no more than verdigris, a patina rapidly scratched off by the grind of being in government.