Relating to or containing cantharidin, the toxic chemical compound produced by blister beetles.
From 'cantharis' (blister beetle) plus the suffix '-idal' meaning 'of or relating to.' The suffix evolved from Latin '-idalis,' meaning 'associated with' or 'pertaining to a type of.'
Cantharidin is so potent that it was once used as an ingredient in wart-removal treatments—but doctors had to be incredibly careful because even tiny overdoses could cause serious organ damage!
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