English Explanatory Dictionary

methylene

English dictionary entry

Meanings

noun
  1. The divalent group –CH₂– in which the free valencies are part of single bonds.
  2. The same group, present as a repeating unit, in aliphatic compounds with names such as hexamethylenediamine.
  3. The unstable carbene :CH₂

Pronunciation

/ˈmɛθɪliːn/ LL-Q1860 (eng)-Vealhurl-methylene.wav

Word forms

methylene methylenes

Etymology

Etymology tree French méthylène English methylene French méthylène, from Ancient Greek μέθυ (méthu, “wine”) + ὕλη (húlē, “wood”). By surface analysis, meth- + -ylene.

Synonyms

methene

Related words

methylenomycin methylidene

Derived words

chloromethylene decamethonium demecarium dimethylene exomethylene hexamethonium medronic acid methenamine methoctramine methylenation methylene-bis-ortho-chloroaniline methylene blue methylene chloride methylenecyclopentadiene methylenecyclopropane methylene dichloride methylenedioxy methylenedioxyamphetamine methylenediphosphonate methylene diphosphonate methylenetetrahydrofolate methylenic new methylene octamethylene oxymethylene pentamethylene pentamethylenediamine polymeric methylene diphenyl diisocyanate polymethylene polyoxybenzylmethylenglycolanhydride polyoxymethylene suxamethonium tetramethylene trimethylene trioxymethylene
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