al·​lyl | \ ˈa-ləl How to pronounce allyl (audio) \

Definition of allyl

: being or containing the unsaturated monovalent radical CH2CHCH2

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Examples of allyl in a Sentence

Recent Examples on the Web According to the Academy of General Dentistry, the allyl methyl sulfide in coffee, onions and garlic can stay in your bloodstream and be expelled via your breath up to 72 hours after consumption. Sandee Lamotte, CNN, "Bad breath behind that coronavirus mask? 10 reasons -- and remedies -- for your halitosis," 5 May 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'allyl.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of allyl

1845, in the meaning defined above

History and Etymology for allyl

International Scientific Vocabulary, from Latin allium garlic

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Time Traveler for allyl

Time Traveler

The first known use of allyl was in 1845

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Cite this Entry

“Allyl.” Dictionary, Merriam-Webster, Accessed 22 Oct. 2020.

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More Definitions for allyl


noun, often attributive
al·​lyl | \ ˈal-əl How to pronounce allyl (audio) \

Medical Definition of allyl

: an unsaturated monovalent radical C3H5 compounds of which are found in the oils of garlic and mustard

Other Words from allyl

allylic \ ə-​ˈlil-​ik, a-​ How to pronounce allylic (audio) \ adjective

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