'Eccentricity' definitions:

Definition of 'eccentricity'

From: WordNet
noun
Strange and unconventional behavior
noun
(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"
noun
A circularity that has a different center or deviates from a circular path [ant: concentricity]

Definition of 'Eccentricity'

From: GCIDE
  • Eccentricity \Ec`cen*tric"i*ty\, n.; pl. Eccentricities. [Cf. F. excentricit['e].]
  • 1. The state of being eccentric; deviation from the customary line of conduct; oddity. [1913 Webster]
  • 2. (Math.) The ratio of the distance between the center and the focus of an ellipse or hyperbola to its semi-transverse axis. [1913 Webster]
  • 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. [1913 Webster]
  • 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. [1913 Webster]

Synonyms of 'eccentricity'

From: Moby Thesaurus