methylene

[ meth-uh-leen ]
/ ˈmɛθ əˌlin /

adjective Chemistry.

containing the methylene group.

Origin of methylene

< French méthylène (coined in 1834), equivalent to Greek méth(y) wine (see mead1) + hýl(ē) wood + French -ène -ene, taken to mean “wood-spirits” (vin ou liqueur spiritueuse du bois), though elements of the compound are in the wrong order to give this sense
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for methylene

methylene
/ (ˈmɛθɪˌliːn) /

noun

(modifier) of, consisting of, or containing the divalent group of atoms =CH 2a methylene group or radical

Word Origin for methylene

C19: from French méthylène, from Greek methu wine + hulē wood + -ene : originally referring to a substance distilled from wood
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for methylene

methylene
[ mĕthə-lēn′ ]

n.

A bivalent hydrocarbon radical, CH2, that is a component of unsaturated hydrocarbons and is derived from methane by the removal of two hydrogen atoms.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for methylene

methylene
[ mĕthə-lēn′ ]

A bivalent hydrocarbon radical, CH2. Because it has two unshared electrons, it is extremely reactive and occurs only as an intermediate byproduct in chemical reactions. Methylene is a component of unsaturated hydrocarbons.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.