±

• +/-

±

1. (sciences) The plus-minus sign, indicating the tolerance or statistical margin of error of a quantity.
2. (mathematics) Either value as a result of addition or subtraction.

   ${\displaystyle ax^{2}+bx+c=0\Rightarrow x={\frac {-b\pm {\sqrt {b^{2}-4ac}}}{2a}}}$ .

3. More or less
   • 1992, Rudolf M[athias] Schuster, The Hepaticae and Anthocerotae of North America: East of the Hundredth Meridian, volume V, New York, N.Y.: Columbia University Press, →ISBN, page 4:

     (b) sporophyte with foot reduced, the entire sporophyte enveloped by the calyptra, which is ± stipitate at the base.

4. (chess) Advantage for white.

• ∓

• HTML: ±
• TeX: \plusmn

lpm-minus sign on Wikipedia.Wikipedia