Excentric vs. Eccentric

(botany) One-sided; having the normally central portion not in the true center.

disk or wheel with off-centre axis

Same as Eccentric, Eccentrical.

One-sided; having the normally central portion not in the true center.

Not at or in the centre; away from the centre.

Not perfectly circular; elliptical.

Example: ‘As of 2008, Margaret had the most eccentric orbit of any moon in the solar system, though Nereid's mean eccentricity is greater.’;

Having a different center; not concentric.

(of a person) Deviating from the norm; behaving unexpectedly or differently.

Against or in the opposite direction of contraction of a muscle (e.g., such as results from flexion of the lower arm (bending of the elbow joint) by an external force while contracting the triceps and other elbow extensor muscles to control that movement; opening of the jaw while flexing the masseter).

Having different goals or motives.

One who does not behave like others.

(slang) A kook; a person of bizarre habits or beliefs.

(geometry) A circle not having the same centre as another.

(engineering) A disk or wheel with its axis off centre, giving a reciprocating motion.

Deviating or departing from the center, or from the line of a circle; as, an eccentric or elliptical orbit; pertaining to deviation from the center or from true circular motion.

Not having the same center; - said of circles, ellipses, spheres, etc., which, though coinciding, either in whole or in part, as to area or volume, have not the same center; - opposed to concentric.

Pertaining to an eccentric; as, the eccentric rod in a steam engine.

Not coincident as to motive or end.

Example: ‘His own ends, which must needs be often eccentric to those of his master.’;

Deviating from stated methods, usual practice, or established forms or laws; deviating from an appointed sphere or way; departing from the usual course; irregular; anomalous; odd; as, eccentric conduct.

Example: ‘He shines eccentric, like a comet's blaze.’;

A circle not having the same center as another contained in some measure within the first.

One who, or that which, deviates from regularity; an anomalous or irregular person or thing.

In the Ptolemaic system, the supposed circular orbit of a planet about the earth, but with the earth not in its center.

A disk or wheel so arranged upon a shaft that the center of the wheel and that of the shaft do not coincide. It is used for operating valves in steam engines, and for other purposes. The motion derived is precisely that of a crank having the same throw.

a person with an unusual or odd personality

a person of a specified kind (usually with many eccentricities);

Example: ‘a real character’; ‘a strange character’; ‘a friendly eccentric’; ‘the capable type’; ‘a mental case’;

conspicuously or grossly unconventional or unusual;

Example: ‘restaurants of bizarre design--one like a hat, another like a rabbit’; ‘famed for his eccentric spelling’; ‘a freakish combination of styles’; ‘his off-the-wall antics’; ‘the outlandish clothes of teenagers’; ‘outre and affected stage antics’;

not having a common center; not concentric;

Example: ‘eccentric circles’;

(of a person or their behaviour) unconventional and slightly strange

Example: ‘he noted her eccentric appearance’;

not placed centrally or not having its axis or other part placed centrally

Example: ‘a servo driving an eccentric cam’;

(of a circle) not centred on the same point as another.

(of an orbit) not circular.

a person of unconventional and slightly strange views or behaviour

Example: ‘he's seen as a local eccentric’;

a disc or wheel mounted eccentrically on a revolving shaft in order to transform rotation into backward-and-forward motion, e.g. a cam in an internal combustion engine.