non-euclidean
adjective
non-eu·clid·e·an
ˌnän-yü-ˈkli-dē-ən 
often capitalized E
: not assuming or in accordance with all the postulates of Euclid's Elements
non-euclidean geometry
Cite this Entry
“Non-euclidean.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/non-euclidean. Accessed 18 Jul. 2025.
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