- Any compound consisting of two or more amino acids, the building blocks of proteins. Peptides are combined to make proteins.
Definition from: Physician Data Query via Unified Medical Language System at the National Library of Medicine
- A peptide is one or more amino acids linked by chemical bonds. The term also refers to the type of chemical bond that joins the amino acids together. A series of linked amino acids is a polypeptide. The cell's proteins are made from one or more polypeptides.
Definition from: Talking Glossary of Genetic Terms from the National Human Genome Research Institute
See also Understanding Medical Terminology.