[thahy-awl, -ol] Chemistry.

1885–90; thi- + -ol1

thiolic [thahy-ol-ik] , adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
thiol (ˈθaɪɒl)
Also called (not in technical usage): mercaptan any of a class of sulphur-containing organic compounds with the formula RSH, where R is an organic group

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American Heritage
Medical Dictionary

thiol thi·ol (thī'ôl', -ōl')

  1. See mercaptan.

  2. A mixture of sulfurated and sulfonated petroleum oils that is purified with ammonia and is used in the treatment of skin diseases.

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
thiol   (thī'ôl', -ōl')  Pronunciation Key 
A sulfur-containing organic compound having the general formula RSH, where R is another element or radical. Thiols are typically very volatile and strong-smelling, and are responsible for the odor of onions, garlic, rotting flesh, and skunk musk. Also called mercaptan.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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