de·mul·cent /dɪˈmʌlsənt/
  (a.)緩和的,鎮痛的緩和劑,鎮痛劑
  De·mul·cent a.  Softening; mollifying; soothing; assuasive; as, oil is demulcent.
  De·mul·cent, n. Med. A substance, usually of a mucilaginous or oily nature, supposed to be capable of soothing an inflamed nervous membrane, or protecting it from irritation. Gum Arabic, glycerin, olive oil, etc., are demulcents.
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  demulcent
       adj : having a softening or soothing effect especially to the skin
             [syn: emollient, salving, softening]
       n : a medication (in the form of an oil or salve etc.) that
           soothes inflamed or injured skin