METHYLENE

Etymology

Noun

methylene (countable and uncountable, plural methylenes)

(organic chemistry) The divalent radical CH₂< in which the free valencies are part of single bonds.

(organic chemistry) The same group, present as a repeating unit, in aliphatic compounds with names such as hexamethylenediamine.

(organic chemistry) The unstable carbene CH₂

Synonyms

• methene

Source: Wiktionary

Meth"yl*ene, n. Etym: [F. méthylène, from Gr. wood spirit.] (Chem.)

Definition: A hydrocarbon radical, CH2, not known in the free state, but regarded as an essential residue and component of certain derivatives of methane; as, methylene bromide, CH2Br2; -- formerly called also methene. Methylene blue (Chem.), an artificial dyestuff consisting of a complex sulphur derivative of diphenyl amine; -- called also pure blue.

Source: Webster’s Unabridged Dictionary 1913 Edition

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