A 
-hyperoctant is one of the 
regions of space defined by the
possible combinations of signs 
. The 2-hyperoctant is
known as a quadrant and the 3-hyperoctant is known as
an octant.
Hyperoctant
See also
Octant, QuadrantExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Hyperoctant." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Hyperoctant.html