meth·​y·​lene | \ ˈme-thə-ˌlēn How to pronounce methylene (audio) , -lən \

Definition of methylene

: a divalent hydrocarbon group CH2 derived from methane

Examples of methylene in a Sentence

Recent Examples on the Web There’s benzene, methylene, and aromatic hydrocarbons, carcinogenic. Lindsey Bartlett, Forbes, 28 Apr. 2021 Covestro also manufacturers the more technically-challenging methylene diphenyl diisocyanate, or MDI, used to make polyurethanes for insulation. Andrew Marc Noel,, 17 Sep. 2020

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

First Known Use of methylene

1835, in the meaning defined above

History and Etymology for methylene

French méthylène, from Greek methy wine + hylē wood — more at mead

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Time Traveler for methylene

Time Traveler

The first known use of methylene was in 1835

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Dictionary Entries Near methylene



methylene blue

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Statistics for methylene

Cite this Entry

“Methylene.” Dictionary, Merriam-Webster, Accessed 27 Sep. 2021.

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More Definitions for methylene


meth·​y·​lene | \ ˈmeth-ə-ˌlēn How to pronounce methylene (audio) , -lən How to pronounce methylene (audio) \

Medical Definition of methylene

: a bivalent hydrocarbon radical CH2 derived from methane by removal of two hydrogen atoms


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