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e·qua·tion

equation

pronunciation:
ih kweI zhn [or] i kweI zhn
features:
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part of speech: noun
definition 1: the act of equating.
definition 2: the state of being equal.
definition 3: in mathematics, a statement using an equal sign to assert the equality of two quantities or expressions.
definition 4: in chemistry, an array of symbols representing a reaction as to both its starting materials and its products, and using an equal sign or arrows to divide the two groups.
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  mathematics