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1 definition found

From: Webster's Revised Unabridged Dictionary (1913)

 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.