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                                                      : a medicine of secret composition recommended by its preparer but usually without scientific proof of its effectiveness                                      
              
                             
… is put to work at county fairs, promoting a quack nostrum for pain relief.—
Patrick McGrath
                         
                
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                                                      : a usually questionable remedy or scheme : panacea                                      
              
                             
an audience eager to believe he had found the nostrum for all of society's ills—
Warren Sloat
                         
                
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  Merriam-Webster unabridged




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