# eccentricity

[ek-suh n-tris-i-tee, ek-sen-]

- an oddity or peculiarity, as of conduct: an interesting man, known for his eccentricities.
- the quality of being eccentric.
- the amount by which something is eccentric.
- Machinery. the distance between the centers of two cylindrical objects one of which surrounds the other, as between an eccentric and the shaft on which it is mounted.
- Mathematics. a constant expressed as the ratio of the distance from a point on a conic to a focus and the distance from the point to the directrix.

## Origin of eccentricity^{}

## Synonyms

See more synonyms on Thesaurus.com2. queerness, strangeness, oddness, freakishness, aberration. Eccentricity, peculiarity, quirk, idiosyncrasy all refer to some noticeable deviation in behavior, style, or manner from what is normal or expected. Eccentricity usually suggests a mildly amusing but harmless characteristic or style: a whimsical eccentricity in choice of clothing. Peculiarity is the most general of these words, referring to almost any perceptible oddity or departure from any norm: the peculiarity of his eyelashes, of the weather. Quirk often refers to a minor, unimportant kind of oddity: Her one quirk was a habit of speaking to strangers in elevators. Sometimes quirk has overtones of strangeness: sexual quirks. Idiosyncrasy refers to a variation in behavior or manner exclusive to or characteristic of a single individual: idiosyncrasies of style that irritated editors but often delighted readers.

Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

## Examples from the Web for eccentricities

### Contemporary Examples

### Historical Examples

#### He really is, with all his eccentricities, a very remarkable man, Bertie.

The Stark Munro LettersJ. Stark Munro

#### And you bear with his eccentricities in hopes of his succession?

#### How did they jest with him on his half-crazed notions, and laugh at his eccentricities!

Arthur O'LearyCharles James Lever

#### No Costaguanero had ever learned to question the eccentricities of a military force.

Nostromo: A Tale of the SeaboardJoseph Conrad

#### Who knows, among her own eccentricities, if this one might not find place?

The Knight Of Gwynne, Vol. II (of II)Charles James Lever

# eccentricity

- unconventional or irregular behaviour
- deviation from a circular path or orbit
- a measure of the noncircularity of an elliptical orbit, the distance between the foci divided by the length of the major axis
- geometry a number that expresses the shape of a conic section: the ratio of the distance of a point on the curve from a fixed point (the focus) to the distance of the point from a fixed line (the directrix)
- the degree of displacement of the geometric centre of a rotating part from the true centre, esp of the axis of rotation of a wheel or shaft

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

## Word Origin and History for eccentricities

# eccentricity

Online Etymology Dictionary, © 2010 Douglas Harper

# eccentricity

[ĕk′sĕn-trĭs′ĭ-tē]

- A measure of the deviation of an elliptical path, especially an orbit, from a perfect circle. It is equal to the ratio of the distance between the foci of the ellipse to the length of the major axis of the ellipse (the distance between the two points farthest apart on the ellipse). Eccentricity ranges from zero (for a perfect circle) to values approaching 1 (highly elongated ellipses).
- The ratio of the distance of any point on a conic section from a focus to its distance from the corresponding directrix. This ratio is constant for any particular conic section.

The American Heritage® Science Dictionary
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