Hypertext Webster Gateway: "Methylene"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Methylene \Meth"yl*ene\, n. [F. m['e]thyl[`e]ne, from Gr. ? wine
+ ? wood; -- a word coined to correspond to the name wood
spirit.] (Chem.)
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}.
From WordNet (r) 1.7 (wn)
methylene
n : the bivalent radical CH2 derived from methane [syn: {methylene
group}, {methylene radical}]
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