PCR Definition
    abbreviation
  
 Polymerase chain reaction.
 Webster's New World 
Stands for polymerase chain reaction, the newest (at this writing) method of DNA analysis. Using PCR technique, it is possible to analyze a biological specimen that is one-tenth the size of that required for the older RFLP method. It also gives quicker results, but the analysis is not as discriminating as RFLP.
 Webster's New World Law