polymerase Definition

any of several enzymes that catalyze the formation of DNA or RNA from precursor substances in the presence of preexisting DNA or RNA acting as a template

an in vitro technique for rapidly synthesizing large quantities of a given DNA segment that involves separating the DNA into its two complementary strands, using DNA polymerase to synthesize two-stranded DNA from each single strand, and repeating the process —abbreviation PCR

any of several polymerases that promote replication or repair of DNA usually using single-stranded DNA as a template

any of a group of enzymes that promote the synthesis of RNA using DNA or RNA as a template