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| du·al·i·ty [ doo állətee ] (plural du·al·i·ties) |
noun |
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1. something consisting of two parts: a situation or nature that has two states or parts that are complementary or opposed to each other
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2. theory of matter: in microphysics, the theory that both wave and particle theory account for the behavior of matter and energy under different conditions
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3. mathematical symmetry of objects or operations: a mathematical symmetry in which some objects or operations can be interchanged without invalidating a relationship, e.g. the interchange of points and lines in a plane in projective geometry
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