salicylic acid

noun Chemistry, Pharmacology.
a white, crystalline, very slightly water-soluble powder, C 7 H 6 O 3 , prepared from salicin or phenol: used as a food preservative, in the manufacture of aspirin, and in medicine chiefly in the form of a salicylate as a remedy for rheumatic and gouty conditions.

Origin:
1830–40

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Collins
World English Dictionary
salicylic acid (ˌsælɪˈsɪlɪk)
 
n
a white crystalline slightly water-soluble substance with a sweet taste and bitter aftertaste, used in the manufacture of aspirin, dyes, and perfumes, and as a fungicide. Formula: C6H4(OH)(COOH)
 
[C19: from salicyl (via French from Latin salix a willow + -yl) + -ic]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

salicylic acid sal·i·cyl·ic acid (sāl'ĭ-sĭl'ĭk)
n.
A white crystalline acid used in making aspirin and in the topical treatment of skin conditions such as eczema.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
salicylic acid   (sāl'ĭ-sĭl'ĭk)  Pronunciation Key 
A white, crystalline acid used to make aspirin, to treat certain skin conditions, and to preserve and flavor foods. Salicylic acid is benzoic acid with a hydroxyl group (OH) attached to the carboxyl group (COOH). Chemical formula: C7H6O3.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Glycerin would have kept her body from drying out too much, and salicylic acid would have prevented the growth of fungi.
Scrub gently with a mildly abrasive material and a soap that contains salicylic acid to remove old skin so that new skin can grow.
Peeling ointments, such as those containing salicylic acid, may be used on thickened lesions.
People aren't the only ones to benefit from salicylic acid, the active ingredient in aspirin.
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