non-Euclidean


non-Eu·clid·e·an

N0139100 (nŏn′yo͞o-klĭd′ē-ən)adj. Of, relating to, or being any of several modern geometries that are not based on the postulates of Euclid.

non-Eu•clid•e•an

(ˌnɒn yuˈklɪd i ən)

adj. differing from the postulates of Euclid or based upon postulates other than those of Euclid: non-Euclidean geometry. [1870–75]