non–euclidean

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adjective, often capitalized E non–eu·clid·e·an \ˌnän-yü-ˈkli-dē-ən\

Definition of non–euclidean

  1. :  not assuming or in accordance with all the postulates of Euclid's Elements non–euclidean geometry

1872

First Known Use of non–euclidean

1872

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