Demulcent /(?)/

De·mul·cent

Demulcent

a.
  1. Softening; mollifying; soothing; assuasive; as, oil is demulcent.

Demulcent

n.
  1. 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. (Med.)