n 1  :  a substance or mixture of substances (as bicarbonates and some proteins in biological fluids) that in solution tends to stabilize the hydrogen-ion concentration by neutralizing within limits both acids and bases  2  :  BUFFER SOLUTION
vt :  to treat (as a solution or its acidity) with a buffer : also  :  to prepare (aspirin) with an antacid .
 
 
 
Similar sounding terms:  bi·o·phore 
 
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