re·lax·ant /rɪˈlæksənt/
  弛緩的; 弛緩劑; 弛緩藥
  re·lax·ant /rɪˈlæksənt/ 形容詞
  弛緩的,弛緩劑
  Re·lax·ant n.  Med. A medicine that relaxes; a laxative.
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  relaxant
       adj : tending to relax or relieve muscular or nervous tension; "a
             relaxant drug"
       n : a drug or treatment that relaxes and relieves tension