Definition of theriac in English:

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Pronunciation: /ˈTHirēˌak/


An ointment or other medicinal compound used as an antidote to snake venom or other poison.
Example sentences
  • Numerous Islamic writers discussed poisons and particularly theriacs, the antidotes for poisons.
  • Ibn al-Mubarak devoted, in addition, a section, to theriacs and general antidotes.
  • Medieval physicians created even more elaborate theriacs to dose a plague-dreading populace, for whom the possibility of a cure-all didn't seem too wild a notion at all.


Late Middle English: from Latin theriaca (see treacle).

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