astringent

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astringent

 [ah-strin´jent]
1. causing contraction or arresting discharges.
2. an agent that causes contraction or arrests discharges, usually locally after topical application. Astringents act as protein precipitants and arrest discharge by causing shrinkage of tissue. Skin preparations such as shaving lotions often contain astringents such as aluminum acetate that help to reduce oiliness and excessive perspiration. Witch hazel is a common household astringent used to reduce swelling. Styptic pencils, used to stop bleeding from small cuts, contain astringents. Zinc oxide and calamine are astringents used in lotions, powders, and ointments to relieve itching and chafing in various forms of dermatitis. Some astringents, such as tannic acid, have been used in treating diarrhea; others, such as boric acid and sodium borate, help relieve the symptoms of inflammation of the mucous membranes of the throat or conjunctiva of the eye. Astringents have some bacteriostatic properties, though they are not generally used as antiseptics.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

as·trin·gent

(as-trin'jent),
1. Causing contraction or shrinkage of the tissues, arrest of secretion, or control of bleeding.
2. An agent having these effects.
[L. astringens]
Farlex Partner Medical Dictionary © Farlex 2012

astringent

(ə-strĭn′jənt)
adj.
Medicine Tending to draw together or constrict tissues; styptic.
n.
A substance or preparation, such as alum, that draws together or constricts body tissues and is effective in stopping the flow of blood or other secretions.

as·trin′gen·cy n.
as·trin′gent·ly adv.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

astringent

adjective Causing local contraction after topical application.
 
Herbal medicine
noun Any herb that hardens and contracts tissues due to its high tannin content, preventing bacterial penetration and inhibiting discharges, diarrhoea and haemorrhage.

Pharmacology
A topical agent (e.g., aluminum-based compounds) that can be variably used: as topical haemostatics, to precipitate proteins, reduce mucosal inflammation, toughen skin, promote healing, as antiseptics, and to act as antiperspirants.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

astringent

adjective Causing local contraction after topical application noun Pharmacology A topical agent–eg, aluminum-based compounds, used to precipitate proteins, as topical hemostatics, to ↓ mucosal inflammation, toughen skin, promote healing, as antiseptics, and as an antiperspirant
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

as·trin·gent

(ă-strin'jĕnt)
1. Causing contraction of the tissues, arrest of secretion, or control of bleeding.
2. An agent having these effects.
[L. astringens]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

astringent

1. A drug that shrinks cells and tightens surfaces by denaturing cell protein.
2. Having the property of tightening surfaces.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

astringent 

A chemical substance that causes contraction of soft organic tissues by precipitating proteins from their surfaces. Astringents are incorporated into some artificial tears. Examples: acetylcysteine, witch hazel, zinc sulfate. See artificial tears.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann

as·trin·gent

(ă-strin'jĕnt)
1. Causing contraction or shrinkage of the tissues, arrest of secretion, or control of bleeding.
2. An agent having these effects.
[L. astringens]
Medical Dictionary for the Dental Professions © Farlex 2012