E-Energy glossary

non-active power for a linear two-terminal element or two-terminal circuit

NOTE 1 - Under sinusoidal conditions, the reactive power is the product of the apparent
power S and the sine of the displacement angle : Q = S sin .
NOTE 2 - The SI unit for reactive power is the voltampere. The special name "var" and
symbol "var" are given in IEC 60027-1.

comment:
Electropedia IEV 131-11-44