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\ ˈem-ˈär-ˈen-ˈā 
\
\ plural mRNAs
Definition of mRNA
: messenger rna Microarrays that identify thousands of active genes at a time are now a standard tool for biologists. They detect the mRNAs produced by active genes. — New Scientist
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Time Traveler for mRNA
The first known use of mRNA was in 1961
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