Eccentricity or eccentric may refer to:
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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 n ...
, odd behavior on the part of a person, as opposed to being "normal"
Mathematics, science and technology
Mathematics
* Off-
center, in geometry
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Eccentricity (graph theory) of a vertex in a graph
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Eccentricity (mathematics)
In mathematics, the eccentricity of a Conic section#Eccentricity, conic section is a non-negative real number that uniquely characterizes its shape.
One can think of the eccentricity as a measure of how much a conic section deviates from being c ...
, a parameter associated with every conic section
Orbital mechanics
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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 be ...
, in astrodynamics, a measure of the non-circularity of an orbit
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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 angle measured at the center of the ellipse between the orbit's periapsis and the current ...
, the angle between the direction of periapsis and the current position of an object on its orbit
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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 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
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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
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Horizontal eccentricity
Horizontal eccentricity refers to the horizontal axis, measured in degrees, along the visual field. The blind spot extends from an eccentricity ''d''1 to eccentricity ''d''2 in temporal direction from the fovea. The size of the blind spot can be ...
, in vision, degrees of visual angle from the center of the eye
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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 land, terrestrial Plane (mathematics), two-dimensional or Three-dimensional space#In Euclidean geometry, three-dimensional positions of Point (geom ...
tripod, to be able to measure hidden points
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Eccentric training, the motion of an active muscle while it is lengthening under load
* Eccentricity, a deviation from
concentricity
Other uses
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Eccentric Club, a London gentlemen's club
* ''
The Eccentric''
* ''
The Eccentrics''
See also
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*
*
Acentric (disambiguation)
{{disambiguation
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