Relating to or derived from blister beetles (canthari) or their active chemical compound cantharidin.
From Latin 'cantharis' (beetle) plus the suffix '-ic' meaning 'of or relating to.' Developed in medical and pharmaceutical terminology during the medieval and Renaissance periods.
Medieval doctors used cantharic preparations to create blisters on patients intentionally—they believed drawing out fluid through blisters could cure disease, which is why cantharidin was called a 'counter-irritant'!
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