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  2  definitions  found 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  Amidogen  \A*mid"o*gen\,  n.  [Amide  +  -gen.]  (Chem.) 
  A  compound  radical,  {NH2},  not  yet  obtained  in  a  separate 
  state,  which  may  be  regarded  as  ammonia  from  the  molecule  of 
  which  one  of  its  hydrogen  atoms  has  been  removed;  --  called 
  also  the  {amido  group},  and  in  composition  represented  by  the 
  form  amido. 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  Hydrazine  \Hy"dra*zine\,  n.  [Hydr-  +  azo-  +  -ine.]  (Chem.) 
  Any  one  of  a  series  of  nitrogenous  bases,  resembling  the 
  amines  and  produced  by  the  reduction  of  certain  nitroso  and 
  diazo  compounds;  as  methyl  hydrazine,  phenyl  hydrazine,  etc 
  They  are  derivatives  of  hydrazine  proper,  {H2N.NH2},  which  is 
  a  doubled  amido  group  recently  (1887)  isolated  as  a  stable, 
  colorless  gas,  with  a  peculiar,  irritating  odor.  As  a  base  it 
  forms  distinct  salts.  Called  also  {diamide},  {amidogen},  (or 
  more  properly  {diamidogen}),  etc