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[mith-ri-deyt] /ˈmɪθ rɪˌdeɪt/
noun, Old Pharmacology.
a confection believed to contain an antidote to every poison.
Origin of mithridate
1520-30; earlier mithridatum < Medieval Latin, variant of Late Latin mithridātium, noun use of neuter of Mithridātius, equivalent to Mithridāt(ēs) Mithridates VI (see mithridatism) + -ius -ious Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for mithridate


(obsolete) a substance believed to be an antidote to every poison and a cure for every disease
Word Origin
C16: from Late Latin mithradatium, after Mithridates VI, alluding to his legendary immunity to poisons
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for mithridate

"antidote against poison," from Medieval Latin mithridatum, from Late Latin mithridatium, neuter of Mithridatius "pertaining to Mithridates," king of Pontus, who made himself poison-proof.

Online Etymology Dictionary, © 2010 Douglas Harper
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