eccentricity

English

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Etymology

eccentric +‎ -ity

Noun

eccentricity (plural eccentricities)

  1. The quality of being eccentric; any eccentric behaviour.
  2. (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.

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Last modified on 1 December 2012, at 16:06