eccentricity

Noun
  1. Strange and unconventional behavior (synset 104806130)
  2. (geometry) a ratio describing the shape of a conic section;
    The ratio of the distance between the foci to the length of the major axis (synset 113899768)
    "a circle is an ellipse with zero eccentricity"
  3. A circularity that has a different center or deviates from a circular path (synset 105081057)

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