PCR

British  

abbreviation

1. polymerase chain reaction: a technique for rapidly producing many copies of a fragment of DNA for diagnostic or research purposes

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PCR Cultural  

1. A laboratory technique that can amplify the amount of DNA from a tiny sample to a large amount within just a few hours. Theoretically, PCR can take one molecule and produce measurable amounts of identical DNA in a short period of time. It is used in DNA fingerprinting and DNA sequencing.

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An enzyme used in this process was originally found in bacteria in hot springs.

Example Sentences

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PCR

Another has mild symptoms and is waiting for the results of a PCR test.

From MarketWatch ● May 11, 2026

One of 17 American citizens repatriated from the ship tested "mildly PCR positive" for the virus while another had "mild symptoms", the US Department of Health and Human Services said on May 10.

From Barron's ● May 11, 2026

If that test is positive, a follow-up PCR test checks for viral RNA to confirm an active infection.

From Science Daily ● Dec. 11, 2025

"The TGA is aware that many companies responsible for sunscreens manufactured using this base formulation relied on testing by PCR Corp to support their SPF claims."

From BBC ● Sep. 30, 2025

The PCR has a similar pyramidal structure, the topmost organs being self-selecting and self-perpetuating.

From Area Handbook for Romania by Donald W. Bernier