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methylene

[ meth-uh-leen ]

adjective

, Chemistry.
  1. containing the methylene group.


methylene

/ ˈmɛθɪˌliːn /

noun

  1. modifier of, consisting of, or containing the divalent group of atoms =CH 2

    a methylene group or radical

“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


methylene

/ mĕthə-lēn′ /

  1. A bivalent hydrocarbon radical, CH 2 . 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.


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Word History and Origins

Origin of methylene1

< French méthylène (coined in 1834), equivalent to Greek méth ( y ) wine ( mead 1 ) + 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
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Word History and Origins

Origin of methylene1

C19: from French méthylène, from Greek methu wine + hulē wood + -ene : originally referring to a substance distilled from wood
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Example Sentences

The most promising of the methods which have been devised are cryoscopy, the methylene-blue test, and the phloridzin test.

The pseudoscientific synonym pheno-methylene-formate carries the idea that Pyo-Atoxin is a definite chemical substance.

Counterstain in methylene blue, aqueous solution thirty seconds.

Counterstain with Kuehne's carbolic methylene-blue for one or two minutes.

Stain carbolic methylene-blue, carbolic fuchsin, and Gram's method.

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methyldopamethylene blue