Source : Webster's Revised Unabridged Dictionary (1913)

Demulcent \De*mul"cent\, a. [L. demulcens, p. pr. of demulcere.]
   Softening; mollifying; soothing; assuasive; as, oil is
   demulcent.

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.

Source : WordNet®

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