mensuration

/M EH1 N SH ER0 EY1 SH AH0 N/
noun
  1. 1

    The act or process of measuring; measurement.

  2. 2

    The study of measurement, especially the derivation and use of algebraic formulae to measure the areas, volumes and different parameters of geometric figures.

  3. 3

    A 13th century system for governing rhythmic relationships in music that was a precursor to the modern use of time signatures; The use of mensural notation.

  4. 4

    The use of quantitative measurements of forest stand to determine stand timber volume, productivity, and health.

Source: https://en.wiktionary.org/wiki/mensuration