Definition of "thiol" [thiol]

• See mercaptan. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "NAC contains a sulfur group known as a thiol, and it is the thiol that gives this amino acid its antioxidant effects."
• "The combination of the two underarm residents creates a chemical called thiol, which smells distinctly like onions."
• "When this mixed with bacteria usually found under the arm, it was transformed into a chemical called thiol, well known for its onion-like smell."