non-Euclidean[nän′yo̵̅o̅ klid′ē ən]
designating or of a geometry that rejects any of the postulates of Euclidean geometry, esp. the postulate that through a given point only one line can be drawn parallel to another line that does not contain the given point
Of, relating to, or being any of several modern geometries that are not based on the postulates of Euclid.
- of, or relating to non-Euclidean geometry