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
*
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
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, ...
, 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
*
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
*
Eccentric contraction
Muscle contraction is the activation of tension-generating sites within muscle cells. In physiology, muscle contraction does not necessarily mean muscle shortening because muscle tension can be produced without changes in muscle length, such as ...
, 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
Eccentric training is a type of strength training that involves using the target muscles to control weight as it moves in a downward motion. This type of training can help build muscle, improve athletic performance, and reduce the risk of injury. ...
, 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'' when they share the same center. Any pair of (possibly unalike) objects with well-defined centers can be concentric, including circles, spheres, regular polygons, regular polyhed ...
Other uses
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Eccentric Club
The Eccentric Club is the name of several London gentlemen's clubs, the best-known of which existed between 1890 and 1986. For much of its history it was based at 9–11 Ryder Street, St James's. The current Club was founded in 2008.
First Ecc ...
, a London gentlemen's club
* ''
The Eccentric
''The Eccentric'' or ''The Odd One'' () is a 1929 German silent comedy film directed by Walter Jerven and starring Karl Valentin, Liesl Karlstadt, and Truus van Aalten. It was made at the Emelka Studios in Munich
Munich is the cap ...
''
* ''
The Eccentrics
''The Eccentrics'' ( ka, შერეკილები, ''Sherekilebi''; , ''Chudaki'') is a 1973 Soviet satire-comedy film
The comedy film is a film genre that emphasizes humor. These films are designed to amuse audiences and make them laugh ...
''
See also
*
*
*
Acentric (disambiguation) Acentric may refer to:
* Acentric factor
The acentric factor is a conceptual number introduced by Kenneth Pitzer in 1955, proven to be useful in the description of fluids. It has become a standard for the phase characterization of single and pu ...
{{disambiguation
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