eccentricity (plural eccentricities)
- The quality of being eccentric; any eccentric behaviour.
- (mathematics) The ratio, constant for any particular conic section, of the distance of a point from the focus to its distance from the directrix.
- For an ellipse, the eccentricity is the ratio of the distance from the center to a focus divided by the length of the semi-major axis.
the quality of being eccentric
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