TERMIUM Plus®

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QUANTITY DIMENSION ONE [1 record]

Record 1 1998-03-23

English

Subject field(s)
  • Metrology and Units of Measure
DEF

Quantity in the dimensional expression of which all the exponents of the dimensions of the base quantities reduce to zero.

OBS

Examples: linear strain, friction factor, Mach number, refractive index, mole fraction (amount-of-substance fraction), mass fraction.

OBS

quantity of dimension one; dimensionless quantity: terms and definition approved by ISO, the International Bureau of Weights and Measures (BIPM), the International Electrotechnical Commission (IEC), the International Organization of Legal Metrology (OIML), and others.

French

Domaine(s)
  • Unités de mesure et métrologie
DEF

Grandeur dont l'expression dimensionnelle en fonction des dimensions des grandeurs de base présente des exposants qui se réduisent tous à zéro.

DEF

Exemples : dilatation linéique relative, facteur de frottement, nombre de Mach, indice de réfraction, fraction molaire, fraction massique.

OBS

grandeur de dimension un; grandeur sans dimension : termes et définition entérinés, entre autres, par l'ISO, le Bureau international des poids et mesures (BIPM), par la Commission électrotechnique internationale (CEI) et par l'Organisation internationale de métrologie légale (OIML).

Key term(s)
  • grandeur adimensionnée

Spanish

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