Definition of methylene in English:

methylene

Syllabification: meth·yl·ene
Pronunciation: /ˈmeTHəˌlēn
 
/

noun

[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.

Origin

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

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