non-Euclidean

non-Euclidean

[non-yoo-klid-ee-uhn]
adjective
differing from the postulates of Euclid or based upon postulates other than those of Euclid.

Origin:
1870–75

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Science Dictionary
non-Euclidean   (nŏn'y-klĭd'ē-ən)  Pronunciation Key 
Relating to any of several modern geometries that are based on a set of postulates other than the set proposed by Euclid, especially one in which all of the postulates of Euclidean geometry hold except the parallel postulate. Compare Euclidean.
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