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duality (n.)
"twofold nature, state of being two or divided in two," late 14c., from Late Latin dualitas, from Latin dualis "that contains two; the dual number, duality," from duo "two" (from PIE root *dwo- "two").
"twofold nature, state of being two or divided in two," late 14c., from Late Latin dualitas, from Latin dualis "that contains two; the dual number, duality," from duo "two" (from PIE root *dwo- "two").
