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Meaning of RETARDER

 
Webster's 1913 Dictionary
 
 Definition: 
  1. \Re*tard"er\ (r[-e]*t[aum]r"d[~e]r), n.
    1. (Steam Boiler) Any of various devices, as a helix of flat
       metal strip, introduced into a boiler tube to increase the
       heating effect of the fire.
    
    2. (Photog.) A substance, as potassium bromide, added to a
       developer to retard its action.
    
    
  2. \Re*tard"er\, n.
    One who, or that which, retards.
    
    
 

 

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