Meaning

noun the doctrine that reality consists of two basic opposing elements, often taken to be mind and matter (or mind and body), or good and evil

originEtymology tree English dual Proto-Indo-European *-id- Proto-Indo-European *-yéti Proto-Indo-European *-idyéti Proto-Hellenic *-íďďō Ancient Greek -ῐ́ζω (-ĭ́zō) Proto-Indo-European *-mos Proto-Indo-European *-mós Ancient Greek -μός (-mós) Ancient Greek -ισμός (-ismós)der. English -ism English dualism From dual + -ism.

Etymology from Wiktionary, CC BY-SA 3.0