- any of several phosphate esters of nucleosides: the basic unit of nucleic acids
- any of several compounds not found in nucleic acids, which function as coenzymes
Origin of nucleotidealtered ; from nucleoside
Any of various compounds consisting of a nucleoside combined with a phosphate group and forming the basic constituent of DNA and RNA.
Origin of nucleotideAlteration of nucleoside.
- (biochemistry) the monomer comprising DNA or RNA biopolymer molecules. Each nucleotide consists of a nitrogenous heterocyclic base (nucleobase), which can be either a double-ringed purine or a single-ringed pyrimidine; a five-carbon pentose sugar (deoxyribose in DNA or ribose in RNA); and a phosphate group.