The monomeric units from which DNA or RNA polymers are constructed. They consist of a purine or pyrimidine base, a pentose sugar, and a phosphate group. (From King & Stansfield, A Dictionary of Genetics, 4th ed)
Nucleotide
D003839
Deoxyadenosines
Adenosine molecules which can be substituted in any position, but are lacking one hydroxyl group in the ribose part of the molecule.