selectivity

/S IH0 L EH0 K T IH1 V AH0 T IY0/
noun
  1. 1

    The quality of being selective; usually the extent to which something is selective.

  2. 2

    The ability of a radio receiver to separate a desired signal frequency from others.

  3. 3

    Discrimination of a reactant towards a choice of other reactants; the ratio of rate constants for different reactants.

Source: https://en.wiktionary.org/wiki/selectivity