eccentricity Definition

1. Peculiarity of behaviour; oddness.

Thesaurus: idiosyncrasy, peculiarity, foible, nonconformity, aberration, anomaly, abnormality, oddity, quiddity, singularity; Antonym: normalcy.
2. Being eccentric.
3. Deviation from a circular orbit, etc.
4. geom.
(symbol e) the constant ratio of the distance of a point on the curve from the focus to its distance from the directrix.
5. The degree of displacement of the geometric centre of a part from the true centre, eg of the axis of rotation of a wheel.