reciprocals

/R IH0 S IH1 P R AH0 K AH0 L Z/
noun
  1. 1

    The number obtained by dividing 1 by another given number; the result of exchanging the numerator and the denominator of a fraction.

    โ€œ0.5 is the reciprocal of 2.โ€

  2. 2

    (grammar) A construction expressing mutual action.

Source: https://en.wiktionary.org/wiki/reciprocal, https://en.wiktionary.org/wiki/reciprocals