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单词 selectivity
释义

WordReference Random House Unabridged Dictionary of American English © 2024
se•lec•tiv•i•ty  (si lek tivi tē, sē′lek-),USA pronunciation n. 
  1. the state or quality of being selective.
  2. Electricity, Electronicsthe property of a circuit, instrument, or the like, by virtue of which it can distinguish oscillations of a particular frequency.
  3. Radio and Televisionthe ability of a receiving set to receive any one of a band of frequencies or waves to the exclusion of others.
  • selective + -ity 1900–05

Collins Concise English Dictionary © HarperCollins Publishers::
selectivity /sɪˌlɛkˈtɪvɪtɪ/ n
  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
WordReference Random House Learner's Dictionary of American English © 2024
se•lec•tive /sɪˈlɛktɪv/USA pronunciation   adj. 
    1. choosing carefully:is a selective shopper.
  • of or relating to a few chosen items; not general:selective enforcement of the laws.
  • se•lec•tive•ly, adv.: The police seem to enforce the traffic laws selectively.
    se•lec•tiv•i•ty /sɪlɛkˈtɪvɪti/USA pronunciation  n. [uncountable]

    WordReference Random House Unabridged Dictionary of American English © 2024
    se•lec•tive  (si lektiv),USA pronunciation adj. 
    1. having the function or power of selecting;
      making a selection.
    2. characterized by selection, esp. fastidious selection.
    3. of or pertaining to selection.
    4. Electricity, Radio and Televisionhaving good selectivity.
    • select + -ive 1615–25
    se•lective•ly, adv. 
    se•lective•ness, n. 
      • 2.See corresponding entry in Unabridged . discriminating, particular, discerning.

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