Definition of "quassin" []

• A very bitter triterpenoid lactone, extracted as white crystals from the quassia tree, used in traditional Chinese medicine (noun)

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• "He also carried a few leaves of quassin doe, the antidote for ten-step poison, but as the poison's name implied, haste with the quassin doe was essential."
• "But if you are shot in another place, maybe your leg, the poison takes longer to work, and you have time to take the quassin doe. '"
• "I didn't know if I had given you the quassin doe in time."