Nucleotide

**Semantic type:** Nucleic Acid, Nucleoside, or Nucleotide

**Definition:** A subunit of DNA or RNA consisting of a nitrogenous base (adenine, guanine, thymine, or cytosine in DNA; adenine, guanine, uracil, or cytosine in RNA), a phosphate molecule, and a sugar molecule (deoxyribose in DNA and ribose in RNA).

**Synonyms:** - Base - Nucleotides - nucleotide