non-Euclidean
adjective mathematics specialized uk/ˌnɒn.juˈklɪd.i.ən/ us/ˌnɑːn.juˈklɪd.i.ən/
非欧几里德的
relating to the study of geometry (= the study of angles and shapes formed by the relationships between lines) that disagrees with or adds to the theories of Euclid
Compare: Euclidean