Definition of quadriplanar in English:

quadriplanar

adjective

rare Geometry
  • Involving four planes; specifically designating a system of homogeneous coordinates in which a point is defined by its distances from four fixed planes.

Origin

Mid 19th century; earliest use found in Philosophical Transactions of the Royal Society of London.

Pronunciation

quadriplanar

/ˌkwɒdrɪˈpleɪnə/