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ec·cen·tric·i·ty /ˌɛk(ˌ)sɛnˈtrɪsəti/

古怪,古怪的行為,怪癖

Ec·cen·tric·i·ty n.; *pl.* Eccentricities

1. The state of being eccentric; deviation from the customary line of conduct; oddity.

2. Math. The ratio of the distance between the center and the focus of an ellipse or hyperbola to its semi-transverse axis.

3. Astron. The ratio of the distance of the center of the orbit of a heavenly body from the center of the body round which it revolves to the semi-transverse axis of the orbit.

4. Mech. The distance of the center of figure of a body, as of an eccentric, from an axis about which it turns; the throw.

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From: WordNet (r) 2.0

eccentricity

n 1: strange and unconventional behavior

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; "a circle is an ellipse with zero

eccentricity"

3: a circularity that has a different center or deviates from a

circular path [ant: concentricity]