"Messenger ribonucleic acid" or mRNA is a crucial component of gene expression. However, there are several synonyms for this term. For instance, it's commonly known as translatable RNA or template RNA which reflects its role in protein synthesis. Another synonym is simply "messenger RNA" which is a shorter and more common phrase. Additionally, due to its single-stranded structure, it's sometimes called "positive-sense RNA." mRNA can also refer to specific types of RNA like heterogeneous or mature mRNA, depending on their degree of processing. Finally, in some contexts, it may be referred to as "coding RNA" or "sense RNA" to differentiate it from its complementary non-coding counterpart, the non-coding RNA (ncRNA).