Definition: | character or combination of characters denoting a quantity
Note 1 to entry: A simple quantity symbol is preferably one, or in some cases two, letters of the Latin or Greek alphabet and may include subscripts, superscripts, or other modifying signs. The letters are in italic (sloping) type, using preferably a font with serifs. The subscripts and superscripts are printed either in roman (upright) type, or, when they denote quantities, variables, or running numbers, in italic (sloping) type. See ISO 80000-1 and IEC 60027-1 for more details and for the combination of symbols.
Note 2 to entry: Quantity symbols are given in the various parts of ISO 80000, IEC 80000, and IEC 60027. Examples
Quantity name
|
Quantity symbol
|
time, duration
|
t
|
wavelength
|
λ
|
solid angle
|
Ω
|
electric resistance
|
R
|
static friction factor
|
µs
|
volume flow rate
|
qV
|
kth force in a system of forces
|
Fk
|
electric field strength
|
E
|
x component of electric field strength
|
Ex
|
Reynolds number
|
Re
|
|