abbreviation
polymerase chain reaction
The tests use a method called polymerase chain reaction, or PCR, to detect genetic materials—bits of viral RNA—that are present in the body when the virus is active.—
Denise Chow
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pcpn
PCR
pct
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Cite this Entry
“PCR.” Merriam-Webster.com Dictionary, Merriam-Webster, https:///dictionary/PCR. Accessed 5 Apr. 2025.
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Medical Definition
PCR
abbreviation
polymerase chain reaction
More from Merriam-Webster on PCR
Britannica.com: Encyclopedia article about PCR
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