Methylene n. (Chem.) A divalent 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.
... may be said in general that treatment is without avail and all efforts should be directed toward prevention. Various medicinal agents, such as carbolic acid administered subcutaneously and methylene blue fed in large quantities, have been recommended, but have failed to stand the tests of scientific investigation and practical use. Serums and vaccines have also been prepared and sold as cures and preventives, but the work is still ... — Special Report on Diseases of Cattle • U.S. Department of Agriculture
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