- A large molecule composed of nucleotide subunits.
Definition from: Human Genome Project Information
at the U.S. Department of Energy
- Any of various acids (as an RNA or a DNA) composed of nucleotide chains.
Definition from: Merriam-Webster's Medical Dictionary by Merriam-Webster Inc.
- Nucleic acid is an important class of macromolecules found in all cells and viruses. The functions of nucleic acids have to do with the storage and expression of genetic information. Deoxyribonucleic acid (DNA) encodes the information the cell needs to make proteins. A related type of nucleic acid, called ribonucleic acid (RNA), comes in different molecular forms that participate in protein synthesis.
Definition from: Talking Glossary of Genetic Terms from the National Human Genome Research Institute
Related discussion in the Handbook
See also Understanding Medical Terminology.