The moiety, —CH2—.
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meth·y·lene 'meth-ə-.lēn, -lən n a bivalent hydrocarbon radical CH2 derived from methane by removal of two hydrogen atoms
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meth·y·lene (methґə-lēn) the bivalent hydrocarbon radical
CH2 or CH2
. Called also methene.
Medical dictionary. 2011.