mRNA

This term is a technical abbreviation for messenger ribonucleic acid. In scientific discourse, it is treated as a specific biochemical entity rather than a general category of matter, though it functions as an uncountable mass noun in most contexts. It is almost exclusively used in biological, medical, and genetic research settings.

Because it is a chemical compound, it does not typically take a plural form in standard scientific writing. Instead, researchers refer to "mRNA levels," "mRNA sequences," or "mRNA strands" to quantify or specify different types of the molecule.