单词	isometry
释义	isometry noun isom·​e·​try ī-ˈsä-mə-trē  plural isometries : a mapping of a metric space onto another or onto itself so that the distance between any two points in the original space is the same as the distance between their images in the second space rotation and translation are isometries of the plane Example Sentences Recent Examples on the Web That’s because symmetries are isometries, which preserve the size and shape of the object. Quanta Magazine, 17 Aug. 2017 Similarly, the properties of isometries guarantee that line segments get mapped to line segments. Quanta Magazine, 17 Aug. 2017 Word History First Known Use 1881, in the meaning defined above
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