Eccentricity

Eccentricity or eccentric may refer to:


 * Eccentricity (behavior), odd behavior on the part of a person, as opposed to being "normal"

Mathematics

 * Off-center, in geometry
 * Eccentricity (graph theory) of a vertex in a graph
 * Eccentricity (mathematics), a parameter associated with every conic section

Orbital mechanics

 * Orbital eccentricity, in astrodynamics, a measure of the non-circularity of an orbit
 * Eccentric anomaly, the angle between the direction of periapsis and the current position of an object on its orbit
 * Eccentricity vector, in celestial mechanics, a dimensionless vector with direction pointing from apoapsis to periapsis
 * Eccentric, a type of deferent, a circle or sphere used in obsolete epicyclical systems to carry a planet around the Earth or Sun

Other uses in science and technology

 * Eccentric (mechanism), a wheel that rotates on an axle that is displaced from the focus of the circle described by the wheel
 * Horizontal eccentricity, in vision, degrees of visual angle from the center of the eye
 * Eccentric contraction, the lengthening of muscle fibers
 * Eccentric position of a surveying tripod, to be able to measure hidden points
 * Eccentric training, the motion of an active muscle while it is lengthening under load
 * Eccentricity, a deviation from concentricity

Other uses

 * Eccentric Club, a London gentlemen's club
 * The Eccentric
 * The Eccentrics