selectivity

noun

1. the state or quality of being selective.
2. Electricity. the property of a circuit, instrument, or the like, by virtue of which it can distinguish oscillations of a particular frequency.
3. Radio. the ability of a receiving set to receive any one of a band of frequencies or waves to the exclusion of others.

noun

1. the state or quality of being selective
2. the degree to which a radio receiver or other circuit can respond to and separate the frequency of a desired signal from other frequencies by tuning
3. the principle that welfare services should go only to those whose need is greatest, as revealed by needs tests, means tests, etc