/ daɪˈkɒtəmi; NAmE -ˈkɑːt-/ noun
[ usually sing. ] ( pl. -ies ) dichotomy (between A and B) ( formal ) the separation that exists between two groups or things that are completely opposite to and different from each other
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WORD ORIGIN
late 16th cent.: via modern Latin from Greek dikhotomia , from dikho- in two, apart + -tomia cutting, from temnein to cut.