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methylenemore about methylene

methylene


  1  definition  found 
 
  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}. 




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