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From New Latin isometria, from Ancient Greek ἰσομετρία (isometría), from ἰσο- (iso-) + -μετρία (-metría), from ἴσος (ísos, equal) and μέτρον (métron, measurement) + -ια (-ia, -y). Equivalent to iso- +‎ -metry.

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isometry (plural isometries)

  1. (mathematics) A function between metric spaces (or on a single metric space) having the property that the distance between two images is equal to the distance between their preimages.
    Isometry is to metric spaces what isomorphism is to groups.

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