Nomenclature is a system of naming and categorizing objects in a given category.

Linnaeus popularised one of the best-known examples: he used the binomial nomenclature system to name the biological world of animals and plants.

See also

In astronomy:

• Planetary nomenclature
• International Astronomical Union (IAU)

In botany:

• International Plant Names Index (IPNI)
• International Code of Botanical Nomenclature (ICBN)
• Cultivar, International Cultivar Registration Authorities (ICRA)

In zoology:

• International Code of Zoological Nomenclature (ICZN)
• PhyloCode

In chemistry:

• International Union of Pure and Applied Chemistry (IUPAC)
• IUPAC nomenclature, for chemical compounds

The Russian expression nomenklatura (like "nomenclature", the word derives from the Latin nomenclatura — "name-calling") refers to a system of government patronage used in many countries under Communist rule.