ˌ ̷ ̷ ̷ ̷ˈdād.ˌizəm noun
( -s )
Etymology: Mithridates VI died 63 B.C. king of ancient Pontus (from Latin Mithridates, from Greek Mithridatēs, Mithradatēs ) + English -ism; from the fact that he reputedly produced this condition in himself
: tolerance to a poison acquired by taking gradually increased doses of it