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The Collaborative International Dictionary of English v.0.48 (gcide)

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]


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


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]