hemiplane
/hɛmɪˈpleɪn/Definitions
1. noun
a line or plane in a three-dimensional space that passes through the origin and is determined by a single equation.
“In geometry class, she explained how to find the hemiplane using the given equation.”
2. noun
a plane that divides a three-dimensional space into two parts.
“The hemiplane in the diagram helps us understand the concept of division in space.”