eccentricity
Americannoun
plural
eccentricities-
an oddity or peculiarity, as of conduct.
an interesting man, known for his eccentricities.
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the quality of being eccentric.
- Synonyms:
- aberration, freakishness, oddness, strangeness, queerness
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the amount by which something is eccentric.
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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.
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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.
noun
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unconventional or irregular behaviour
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deviation from a circular path or orbit
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a measure of the noncircularity of an elliptical orbit, the distance between the foci divided by the length of the major axis
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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)
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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
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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).
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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.
Related Words
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.
Etymology
Origin of eccentricity
First recorded in 1545–55; from Medieval Latin eccentricitās, equivalent to eccentric- ( see eccentric) + -itās -ity
Explanation
Eccentricity is strange, out-of-the-ordinary, sometimes weirdly attractive behavior or dress. Sleeping with your boots on is pretty normal if you're a cowboy, but leaving them on for bedtime in your city apartment, that shows some eccentricity. Eccentricity goes back to the Greek ekkentros, meaning "off center," and when you describe people as being a little "off," you might be talking about their eccentricity or behavior that's a bit abnormal. An eccentricity might be some really small character trait, like eating all of the green food on your plate first, or a large and very obvious characteristic, as when you ride a donkey to your suburban school instead of taking the bus.
Vocabulary lists containing eccentricity
Over The Moon: Planetary Vocabulary
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The Absolutely True Diary of a Part-Time Indian
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The Things They Carried
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Eccentricity level: Pretty levelheaded, although who’s to say whether her relationship with her difficult mother didn’t inspire unseen neuroses that led her to turn to pen and paper.
From New York Times • Dec. 8, 2020
Eccentricity and consistency don’t always get along, and Bouley is a slightly eccentric restaurant, as Frank Bruni noted the last time it was reviewed in The New York Times, in 2009.
From New York Times • Mar. 1, 2016
Eccentricity is important because when it is high, the Earth- Sun distance varies more from season to season than it does when eccentricity is low.
From Textbooks • Jan. 1, 2015
Eccentricity is a valuable commodity in pop music.
From The Guardian • May 30, 2010
Eccentricity may appear harmless and even interesting, but in practice it is found to be a drawback, enfeebling some sides of a character, throwing the judgment at least on some points out of focus.
From The Education of Catholic Girls by Stuart, Janet Erskine
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.