An Etymological Dictionary of Astronomy and Astrophysics

Representation of numbers, quantities, or other entities by symbols; a system of symbols for such a purpose.

Etymology (EN): From L. notationem (nom. notatio) “a marking, explanation,” from notatus, p.p. of notare “to note.”

Etymology (PE): Namâdgân, from namâd, → symbol, + -gân suffix denoting order, organization, multiplicity.