Definition of methylene in English:


Syllabification: meth·yl·ene
Pronunciation: /ˈmeTHəˌlēn


[as modifier] Chemistry
The divalent radical or group —CH2—, derived from methane by loss of two hydrogen atoms: methylene chloride
More example sentences
  • Your body changes some inhaled methylene chloride to carbon monoxide.
  • The formation of conjugated dienes occurs when free radicals attack the hydrogens of methylene groups separating double bonds and leading to a rearrangement of the bonds.
  • Paint and other materials that are not soluble in degreasing solvents may require the use of methylene chloride, alkaline cleaners, or special proprietary compounds.


mid 19th century: from French méthylène (formed irregularly from Greek methu 'wine' + hulē 'wood') + -ene.

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Pronunciation: wiːn
be of the opinion; think or suppose