gyroparallelogram

English

Etymology

gyro- +‎ parallelogram

Noun

gyroparallelogram (plural gyroparallelograms)

1. (hyperbolic geometry) A hyperbolic quadrilateral whose two gyrodiagonals intersect at their gyromidpoints, analogous to a parallelogram in Euclidean space.
   • 2005, Ungar Abraham Albert, Analytic Hyperbolic Geometry:

     The 6 faces of a parallelepiped are parallelograms while, in general, the 6 faces of a gyroparallelepiped are not gyroparallelograms.