- an oddity or peculiarity, as of conduct: an interesting man, known for his eccentricities.
- the quality of being eccentric.
- the amount by which something is eccentric.
- the distance between the centers of two cylindrical objects one of which surrounds the other, as between an eccentric and the shaft on which it is mounted.
- a constant expressed as the ratio of the distance from a point on a conic to a focus and the distance from the point to the directrix.
- unconventional or irregular behaviour
- deviation from a circular path or orbit
- a measure of the noncircularity of an elliptical orbit, the distance between the foci divided by the length of the major axis
- a number that expresses the shape of a conic section: the ratio of the distance of a point on the curve from a fixed point (the focus) to the distance of the point from a fixed line (the directrix)
- the degree of displacement of the geometric centre of a rotating part from the true centre, esp of the axis of rotation of a wheel or shaft
