Analytical, Diagnostic and Therapeutic Techniques, and Equipment

International System of Units

A system of physical units in which the fundamental quantities are length, time, mass, electric current, temperature, luminous intensity, and amount of substance, and the corresponding units are the meter, second, kilogram, ampere, kelvin, candela, and mole. The system has been given official status and recommended for universal use by the General Conference on Weights and Measures.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

A system of physical units in which the fundamental quantities are length, time, mass, electric current, temperature, luminous intensity, and amount of substance, and the corresponding units are the meter, second, kilogram, ampere, kelvin, candela, and mole. The system has been given official status and recommended for universal use by the General Conference on Weights and Measures.

MeSH Record

Classification

Broader headings

Related Concepts

Knowledge Graph

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MeSH Record

Synonyms

5 entry terms
  • SI Units
  • Systeme International d'Unites
  • SI Unit
  • Unit, SI
  • Units, SI

MeSH Record

Aspects Covered

4 allowable subheadings

Indexed with the subheadings classification, history, instrumentation, standards.

MeSH Record

Indexing Annotation

in titles use diacritics: Système International d'Unites; CATALOGER: Use NAF entry

MeSH Record

History Note

91(79); was see under WEIGHTS AND MEASURES 1979-90

MeSH Record

Previous Indexing

  • Metric System (1974-1978)
  • Weights and Measures (1966-1978)

MeSH Hierarchy

Tree Number

  1. E05.978.507w

AMA Style

References

  1. National Library of Medicine. International System of Units. Medical Subject Headings (MeSH). 2026. Unique ID D007394. http://id.nlm.nih.gov/mesh/2026/D007394
  2. International System of Units. In: Wikipedia. https://en.wikipedia.org/wiki/International_System_of_Units
  3. International System of Units. In: Wikidata. https://www.wikidata.org/wiki/Q12457