empirical formula

/EH0 M P IH1 R IH0 K AH0 L F AO1 R M Y AH0 L AH0/
noun
  1. 1

    A notation indicating the ratios of the various elements present in a compound, without regard to the actual numbers.

    โ€œThe molecular formula for ethane is C2H6, while the empirical formula is CH3.โ€

Source: https://en.wiktionary.org/wiki/empirical%20formula