Definition of "allyl" [al•lyl]

• The univalent, unsaturated organic radical C3H5. (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.

• "Some scientists believe the components in onions and garlic called allyl sulfides and bioflavonoids may be key to the research observations of generally lower incidence of cancer and heart disease in people who consume large amounts of garlic and onions, compared with those who eat less."
• "When consumed, garlic leaves a compound called allyl methyl sulfide in the mouth."
• "They possess alike the same properties and characteristics, though in varying degrees, and they severally belong to the genus _Allium_, each containing "allyl," which is a radical rich in sulphur."