pro·phy·lac·tic /ˌprofəˈlæktɪk ||ˌprɑ-/
 (a.)預防疾病的預防藥,預防法,避孕藥


 pro·phy·lac·tic /ˌprofəˈlæktɪk , ˌprɑfə-/ 形容詞



 Proph·y·lac·tic n.  Med. A medicine which preserves or defends against disease; a preventive.

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 Proph·y·lac·tic Proph·y·lac·tic·al, a.  Med. Defending or preserving from disease; preventive.

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 prophylactic
      adj 1: capable of preventing conception or impregnation;
             "contraceptive devices and medications" [syn: contraceptive,
              antifertility]
      2: tending to ward off; "the swastika...a very ancient
         prophylactic symbol occurring among all peoples"- Victor
         Schultze [syn: cautionary, preventive]
      3: preventing or contributing to the prevention of disease;
         "preventive medicine"; "vaccines are prophylactic"; "a
         prophylactic drug" [syn: preventive, preventative]
      n 1: remedy that prevents or slows the course of an illness or
           disease; "the doctor recommended several preventatives"
           [syn: preventive, preventative]
      2: contraceptive device consisting of a thin rubber or latex
         sheath worn over the penis during intercourse [syn: condom,
          rubber, safety, safe]