Eccentricity or eccentric may refer to:
*
Eccentricity (behavior)
Eccentricity (also called quirkiness) is an unusual or odd behavior on the part of an individual. This behavior would typically be perceived as unusual or unnecessary, without being demonstrably maladaptive. Eccentricity is contrasted with norm ...
, odd behavior on the part of a person, as opposed to being "normal"
Mathematics, science and technology
Mathematics
* Off-
center, in geometry
*
Eccentricity (graph theory) of a vertex in a graph
*
Eccentricity (mathematics)
In mathematics, the eccentricity of a conic section is a non-negative real number that uniquely characterizes its shape.
More formally two conic sections are similar if and only if they have the same eccentricity.
One can think of the eccentr ...
, a parameter associated with every conic section
Orbital mechanics
*
Orbital eccentricity
In astrodynamics, the orbital eccentricity of an astronomical object is a dimensionless parameter that determines the amount by which its orbit around another body deviates from a perfect circle. A value of 0 is a circular orbit, values b ...
, in astrodynamics, a measure of the non-circularity of an orbit
*
Eccentric anomaly In orbital mechanics, the eccentric anomaly is an angular parameter that defines the position of a body that is moving along an elliptic Kepler orbit. The eccentric anomaly is one of three angular parameters ("anomalies") that define a position a ...
, the angle between the direction of periapsis and the current position of an object on its orbit
*
Eccentricity vector In celestial mechanics, the eccentricity vector of a Kepler orbit is the dimensionless vector with direction pointing from apoapsis to periapsis and with magnitude equal to the orbit's scalar eccentricity. For Kepler orbits the eccentricity vecto ...
, in celestial mechanics, a dimensionless vector with direction pointing from apoapsis to periapsis
* Eccentric, a type of
deferent
In the Hipparchian, Ptolemaic, and Copernican systems of astronomy, the epicycle (, meaning "circle moving on another circle") was a geometric model used to explain the variations in speed and direction of the apparent motion of the Moon, S ...
, 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)
In mechanical engineering, an eccentric is a circular disk (''eccentric sheave'') solidly fixed to a rotating axle with its centre offset from that of the axle (hence the word " eccentric", out of the center).
It is used most often in steam eng ...
, 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
Surveying or land surveying is the technique, profession, art, and science of determining the terrestrial two-dimensional or three-dimensional positions of points and the distances and angles between them. A land surveying professional is ...
tripod, to be able to measure hidden points
*
Eccentric training
An eccentric contraction is the motion of an active muscle while it is lengthening under load. Eccentric training is repetitively doing eccentric muscle contractions. For example, in a biceps curl the action of lowering the dumbbell back down from ...
, the motion of an active muscle while it is lengthening under load
* Eccentricity, a deviation from
concentricity
In geometry, two or more objects are said to be concentric, coaxal, or coaxial when they share the same center or axis. Circles, regular polygons and regular polyhedra, and spheres may be concentric to one another (sharing the same cente ...
Other uses
*
Eccentric Club, a London gentlemen's club
* ''
The Eccentric''
* ''
The Eccentrics
''The Eccentrics'' ( ka, შერეკილები, ''Sherekilebi''; russian: Чудаки, ''Chudaki'') is a 1973 Soviet satire-comedy film
A comedy film is a category of film which emphasizes humor. These films are designed to make the ...
''
See also
*
*
*
Acentric (disambiguation)
{{disambiguation
ta:சுற்றுப்பாதையின் வட்டவிலகல்