Entitic area - Dynamic NPU Manual

Entitic area

Definition in words

The area of component divided by the number of component B

Alternative expression: Average area of component B

Definition by equation

Systematic terms

Entitic area 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-∞


µm2, mm2, cm2, m2, etc.

Note: The correct unit is e.g. “mm2/1″ but “1” is omitted.


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.

Laboratory field


Clinical Biochemistry

Generic abbreviated
NPU04074 B—Erythrocyte surface; entitic area = ? µm²
Full result NPU04074 Blood—Erythrocyte surface; entitic area = 140 µm²
Abbreviated result NPU04074 B—Erythrocyte surface; entitic area = 140 µm²
Written expression The area of Erythrocyte surface divided by number of Erythrocytes in Mr. Smith’s blood is [140] µm2.



Alternative written expression:

The area of erythrocyte surface per erythrocyte is [140] µm2


NPU database, https://www.ifcc.org/ifcc-scientific-division/sd-committees/c-npu/npusearch/ and http://www.labterm.dk/default.aspx
  • Kind-of-property

    • Nominal kind-of-property

    • Kind-of-quantity

      • Unitary kind-of-quantity

        • Rational unitary kind-of-quantity


  • 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 Entitic area Term established