selectivity

1. The quality of being selective, or extent to which something is selective. (countable, uncountable)
2. The ability of a radio receiver to separate a desired signal frequency from others. (countable, uncountable)
3. Discrimination of a reactant towards a choice of other reactants; the ratio of rate constants for different reactants. (countable, uncountable)
4. An approach to social work that prioritizes people perceived as having the most need for assistance. (countable, uncountable)

Plural selectivities