The Collaborative International Dictionary of English v.0.48:

Obtundent \Ob*tund"ent\, n. [L. obtundens, p. pr. of obtundere.]
   (Med.)
   A substance which sheathes a part, or blunts irritation,
   usually some bland, oily, or mucilaginous matter; -- nearly
   the same as demulcent. --Forsyth.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Demulcent \De*mul"cent\, a. [L. demulcens, p. pr. of demulcere.]
   Softening; mollifying; soothing; assuasive; as, oil is
   demulcent.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

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.
   [1913 Webster]

WordNet (r) 3.0 (2006):

demulcent
    adj 1: having a softening or soothing effect especially to the
           skin [syn: demulcent, emollient, salving,
           softening]
    n 1: a medication (in the form of an oil or salve etc.) that
         soothes inflamed or injured skin