One of the mysteries of the English language finally explained.
as modifier The divalent radical or group —CH₂—, derived from methane by loss of two hydrogen atoms.‘methylene chloride’
- ‘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.’
- ‘Your body changes some inhaled methylene chloride to carbon monoxide.’
- ‘These techniques include dry abrasive blasting and on-site use of methylene chloride or propane torches.’
- ‘Paint and other materials that are not soluble in degreasing solvents may require the use of methylene chloride, alkaline cleaners, or special proprietary compounds.’
- ‘There are roughly two categories of products available; those containing methylene chloride, and those that don't.’
Mid 19th century: from French méthylène (formed irregularly from Greek methu ‘wine’ + hulē ‘wood’) + -ene.
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