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  2  definitions  found 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  Diamide  \Di*am"ide\  (?;  104),  n.  [Pref.  di-  +  amide.]  (Chem.) 
  Any  compound  containing  two  amido  groups  united  with  one  or 
  more  acid  or  negative  radicals,  --  as  distinguished  from  a 
  diamine.  Cf  Amido  acid,  under  {Amido},  and  Acid  amide,  under 
  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