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| a mathematical element that when added to another number yields the same number | ||||
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| a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential | ||||
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| a score of zero in tennis or squash | ||||
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| of or relating to the null set (a set with no members) | ||||
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| indicating the absence of any or all units under consideration |