Intramolecular describes a process or characteristic limited within the structure of a single, or each molecule; a property or phenomenon limited to the extent of a single, or each molecule.

Examples:

• intramolecular hydride transfer (transfer of a hydride ion from one part to another within the same molecule);
• intramolecular hydrogen bond (a hydrogen bond formed between two functional groups of the same molecule)

See also: intermolecular, molecule