Webster's English Dictionary

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selective

se.lec.tive \s*-'lek-tiv\ \si-.lek-'tiv-*t-e-, .se--\ aj 1: of, relating 
   to, or characterized by selection : selecting or tending  to select 2: of, 
   relating to, or constituting the ability of a radio circuit or appa ratus 
   to respond to a specific frequency without interference - se.lec.tive.ly av