English dictionary
methylene
/'m/E//T//@/,l/i/n/
Definitions, examples, synonyms and antonyms from WordNet 3.0.
noun
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the bivalent radical CH2 derived from methane
Source: WordNet 3.0
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A hydrocarbon radical, CH<sub>2</sub>, not known in the free state, but regarded as an essential residue and component of certain derivatives of methane; as, <i>methylene</i> bromide, CH<sub>2</sub>Br<sub>2</sub>; -- formerly called also <i>methene</i>.
Source: webster1913