Eccentricity
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- In mathematics, eccentricity is a parameter associated with every conic section. It can be thought of as a measure of how much the conic section deviates from being circular.
- In astrodynamics eccentricity of an orbit can be calculated from orbital state vectors as an absolute value of eccentricity vector or using other methods based on orbital energy and angular momentum.
- In mechanical engineering, an eccentric is a wheel that rotates on an axle that is displaced from the focus of the circle described by the wheel—in other words, a mechanical motion that can operate either as a cam or a crank, depending upon how it is driven.
- In popular usage, eccentricity refers to unusual or odd behavior on the part of a person, as opposed to being normal.
de:Exzentrizität eo:Discentreco fr:Excentricité it:Eccentricità nl:Excentriek ja:離心率 pl:Ekscentryczność (fizyka) tr:Eksantriklik