Home | Aging-Related Terms Glossary | PCR (Polymerase Chain Reaction) A B C D E F G H I J K L M N O P Q R S T U v W X Y Z Home | Aging-Related Terms Glossary | PCR (Polymerase Chain Reaction) PCR (Polymerase Chain Reaction) A laboratory technique used to amplify and analyze DNA, often used in genetic testing and research.