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  1  definition  found 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  Hydriodic  \Hy`dri*od"ic\,  a.  [Hydr-  +  iodic:  cf  F. 
  hydriodique.]  (Chem.) 
  Pertaining  to  or  derived  from  hydrogen  and  iodine;  --  said 
  of  an  acid  produced  by  the  combination  of  these  elements. 
  {Hydriodic  acid}  (Chem.),  a  pungent,  colorless  gas,  {HI}, 
  usually  prepared  as  a  solution  in  water.  It  is  strong 
  reducing  agent.  Called  also  {hydrogen  iodide}.