Methylene

//ˈmɛθɪliːn// noun

Definitions

Noun
  1. 1
    The divalent group –CH₂– in which the free valencies are part of single bonds. countable, uncountable
  2. 2
    the bivalent radical CH2 derived from methane wordnet
  3. 3
    The same group, present as a repeating unit, in aliphatic compounds with names such as hexamethylenediamine. countable, uncountable
  4. 4
    The unstable carbene :CH₂ countable, uncountable

Etymology

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

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