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VIM-international Vocabulary of Metrology

Fundamental and general concepts and related terms

[CEI UNI 70099 – Terza Edizione]

VIM (third edition) is a vocabulary, developed at international levelby the most important standardization bodies, metrology organizations and accreditation laboratories1

Purpose of the VIM is provide the essential elementsto allow all Operators interested in the measures and results of the measures to use a clear and unique language, avoiding misunderstandings of both technical documents and measurement results, even if these should be used not only in a technical context, but also for commercial purposes.

The VIM vocabulary aims to be a reference reference for governamental and intergovernamental bodies, professionals and trade associations, standardization and accreditation bodies, regulators, Universities, purchase departments drafting technical specifications and manufacturers of instruments for the definition of metrological characteristics.

In consideration ofthe importance of such a document and and with the clear intent to promote its diffusion at best, CEI (that worked out the italian translation in cooperation with UNI in a “Mixed Commission UNI-CEI of General Metrology”) decided to make available in addition to the usual chargeable hard copy or PDF versions). a free online version.

The online free versionof VIM, accessible on this site by clicking on the button below, allows you to directly search and consult the terms of interest in the metrological field, giving – for each word its whole definition, the respective English and French translation (for both definition and terms) and their links to other correlated words (when necessary).

There are indexes in all three languages, allowing the use of this Vocabulary also to check translations in the respective different languages.

In order to get a global view of the whole Vocabulary, the standard (in three languages) may be purchased, in both hard copy or PDF version, following the usual CEI sales channels (for more information, please contact

1 International organizations that have participated in the implementation of the VIM since 1997

BIPM – Bureau International des Poids et Mesures,
IEC – Commissione Elettrotecnica Internazionale,
IFCC – Federazione Internazionale di Chimica Clinica e Medicina di Laboratorio,
ISO – Organizzazione Internazionale di Normalizzazione,
IUPAC – Unione Internazionale di Chimica Pura ed Applicata,
IUPAP – Unione Internazionale di Fisica Pura ed Applicata
OIML – Organizzazione Internazionale di Metrologia Legale,
ILAC – Cooperazione Internazionale per l’Accreditamento dei Laboratori (dal 2005)