Uridylic acid is a nucleotide that forms a building block of RNA and can combine with other nucleotides to form RNA strands. However, there are several synonymous terms that may be used to refer to this molecule, including uracil ribonucleotide, uridine monophosphate, and uridine 5'-monophosphate (UMP). Uridylic acid is one of the four standard nucleotides that make up RNA alongside adenine, guanine, and cytosine. It plays an essential role in the formation of RNA, which is responsible for coding genetic information within living organisms. Understanding the synonyms associated with uridylic acid helps to make the study of molecular biology more accessible and streamlined.