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Chemistry is the science of matter, especially its chemical reactions, but also its composition, structure and properties. Chemistry is concerned with atoms and their ...

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chemistry n. , pl. , -tries . The science of the composition, structure, properties, and reactions of matter, especially of atomic and molecular systems.

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noun, plural -tries. 1. the science that deals with the composition and properties of substances and various elementary forms of matter. Compare element ( def. 2 ...