Areic number - Dynamic NPU Manual

Areic number

Definition in words

Number of component B divided by area of system 1

Definition by equation

Systematic terms

Areic number of component B in system 1

Result type

Rational scale
  • Value sets are positive numerical values
  • Algebraic operations are allowed (a=nb; a≠nb)
Numerical values from 0-∞


1/mm2, 103/cm2, 1012/m2, etc.

Unit, one (1) is omitted in the NPU syntax


Ferard G, Dybkaer R, Fuentes-Arderiu X. Compendium of Terminology and Nomenclature of Properties in Clinical Laboratory Sciences : Recommendations 2016. 1 ed: Royal Society of Chemistry; 2016. 182 p. doi:10.1039/9781782622451.

Laboratory field


Clinical Chemistry

Generic abbreviated
NPU27123 Skin—Petechiae(pressure induced); areic number(proc.) = ? cm-2
Full result NPU27123 Skin—Petechiae(pressure induced); areic number(procedure) = 3 cm-2
Abbreviated result NPU27123 Skin—Petechiae(pressure induced); areic number(proc.) = 3 cm-2
Written expression The areic number of pressure induced Petechiae of Mr. Smith’s skin is [3] cm-2. The measurement is performed according to a procedure defined by the laboratory.


  • Kind-of-property

    • Nominal kind-of-property

    • Kind-of-quantity

      • Unitary kind-of-quantity

        • Rational unitary kind-of-quantity

          • Areic number


  • Dybkaer R. Concept system on ‘quantity’: formation and terminology. Accredit Qual Assur. 2013;18(3):253-60.
  • Dybkaer R. ISO terminological analysis of the VIM3 concepts ‘quantity’ and ‘kind-of-quantity’. Metrologia. 2010;47(3):127-34.
Date Term Note
1996-01-01 Areic mass Term established