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1. Oxford Dictionary

   empirical formula

   • n.
     a formula giving the proportions of the elements present in a compound but not the actual numbers or arrangement of atoms.

   • noun: empirical formula, plural noun: empirical formulae

2. • 更多解釋

   empirical formula

   • IPA[əmˈpirikəl]

   • n.
     a formula giving the proportions of the elements present in a compound but not the actual ...

   Oxford American Dictionary