Having the ability to cleanse or remove impurities; relating to the process of cleaning away dirt or foreign matter.
From Latin 'abstergere' (to wipe away) plus the adjective-forming suffix '-ive'; this medical term developed in scholarly writing during the medieval and Renaissance periods.
Medieval and Renaissance doctors created whole categories of medicines called 'abstersive remedies,' believing certain herbs and minerals had innate powers to cleanse—this reflects how ancient medicine mixed observation with theory in fascinating ways.
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