Noun

(eccentricities)

The quality of being eccentric; any eccentric behaviour.

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, title=(The Celebrity), chapter=5 , passage=Although the Celebrity was almost impervious to sarcasm, he was now beginning to exhibit visible signs of uneasiness, the consciousness dawning upon him that his eccentricity was not receiving the ovation it merited.}}

(mathematics) The ratio, constant for any particular conic section, of the distance of a point from the focus to its distance from the directrix.