Glossary entry

n.
The fixation of a name-bearing type of a nominal taxon so as to provide an objective standard of reference for the application of the name of a taxon.

Source:
International Commission on Zoological Nomenclature (1999) International Code of Zoological Nomenclature. Fourth Edition. - International Trust for Zoological Nomenclature, XXIX + 306 pp.

See also:
Principle of Typification