# eccentricity

## Definitions

• Vessel of eccentric form: Arkansas.--1/3
• WordNet 3.6
• n eccentricity strange and unconventional behavior
• n eccentricity a circularity that has a different center or deviates from a circular path
• n eccentricity (geometry) a ratio describing the shape of a conic section; the ratio of the distance between the foci to the length of the major axis "a circle is an ellipse with zero eccentricity"
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Eccentric and Rod

Webster's Revised Unabridged Dictionary
• Interesting fact: Because of a large orbital eccentricity, Pluto was closer to the sun than Neptune between January 1979 and March 1999.
• Eccentricity (Mech) The distance of the center of figure of a body, as of an eccentric, from an axis about which it turns; the throw.
• Eccentricity (Math) The ratio of the distance between the center and the focus of an ellipse or hyperbola to its semi-transverse axis.
• Eccentricity (Astron) The ratio of the distance of the center of the orbit of a heavenly body from the center of the body round which it revolves to the semi-transverse axis of the orbit.
• Eccentricity The state of being eccentric; deviation from the customary line of conduct; oddity.
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Century Dictionary and Cyclopedia
• n eccentricity Deviation from a center; the state of a circle with reference to its center not coinciding with that of another circle.
• n eccentricity In geometry and astronomy, the distance between the foci of a conic divided by the transverse diameter. The eccentricity of the earth's orbit is .01677, or about .
• n eccentricity In ancient astronomy, the distance of the center of the equant from the earth.
• n eccentricity Departure or deviation from that which is stated, regular, or usual; oddity; whimsicalness: as, the eccentricity of a man's genius or conduct.
• n eccentricity An eccentric action or characteristic; a striking peculiarity of character or conduct.
• n eccentricity Also excentricity in the literal uses.
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Chambers's Twentieth Century Dictionary
• n Eccentricity the distance of the centre of a planet's orbit from the centre of the sun: singularity of conduct: oddness
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## Quotations

• Edward G. Bulwer-Lytton
“The world thinks eccentricity in great things is genius, but in small things, only crazy.”
• Julian Clary
“The English like eccentrics. They just don't like them living next door.”
• Johann Wolfgang Von Goethe
“People of uncommon abilities generally fall into eccentricities when their sphere of life is not adequate to their abilities.”
• John Stuart Mill
“That so few now dare to be eccentric, marks the chief danger of the time.”
• Robert Downey Jr.
“A lot of my peer group think I'm an eccentric bisexual, like I may even have an ammonia-filled tentacle somewhere on my body. That's okay.”
• Bertrand Russell
“Do not fear to be eccentric in opinion, for every opinion now accepted was once eccentric.”

## Etymology

Webster's Revised Unabridged Dictionary
Cf. F. excentricité,
Chambers's Twentieth Century Dictionary
Fr.,—Low L. eccentricus—Gr. ek, out of, kentron, centre.

## Usage

### In literature:

The saw is driven by a wooden eccentric placed on the saw mandrel shown in Figs.
"Scientific American Supplement, No. 312, December 24, 1881" by Various
His pedantic and eccentric character is well known.
"Salem Witchcraft, Volumes I and II" by Charles Upham
This was owing to some eccentricity in the official spelling of our name.
"Russian Rambles" by Isabel F. Hapgood
He is an eccentric book-keeper, a Pindaric accountant.
"The Works of the Right Honourable Edmund Burke, Vol. X. (of 12)" by Edmund Burke
To him the term did not convey any idea of frivolity or eccentricity, but of crime and wickedness.
"History of English Humour, Vol. 1 (of 2)" by Alfred Guy Kingan L'Estrange
It is given on account of the stem growing in a lateral or eccentric manner.
"Among the Mushrooms" by Ellen M. Dallas and Caroline A. Burgin
And it must be admitted that Mr. Gerzson's mode of travelling on this occasion was decidedly eccentric.
"The Poor Plutocrats" by Maurus Jókai
Joe flung a leg over his eccentric, red-painted mount.
"Space Tug" by Murray Leinster
Hence all sorts of eccentricities, inconsistencies, and absurdities.
"Personal Recollections of Birmingham and Birmingham Men" by E. Edwards
The eccentrics and the taste for them have passed away.
"Shadows of the Stage" by William Winter
Levermen wipe off and re-lacquer their respective levers and eccentrics, secure levers in place, and assist in securing the gun.
"Ordnance Instructions for the United States Navy." by Bureau of Ordnance, USN
But was that, indeed, your motive in being so eccentric?
"The Entailed Hat" by George Alfred Townsend
To be sure, he was not without his eccentricities.
"Library of the World's Best Literature, Ancient and Modern  Volume 11" by Various
Its orbit is very elongated, very eccentric.
"Astronomy for Amateurs" by Camille Flammarion
To this I do think a certain corrective could be found in the nature of English eccentricity.
"What I Saw in America" by G. K. Chesterton
The performance was eccentric.
"A Bird-Lover in the West" by Olive Thorne Miller
It was not any rocking on the part of the raft that was producing these eccentric movements.
"The Ocean Waifs" by Mayne Reid
We have possibly made too much of the savanna sparrow's innocent eccentricity.
"Birds in the Bush" by Bradford Torrey
Between the Duchess and Congreve sprang up a most eccentric friendship.
"Critical and Historical Essays, Volume III (of 3)" by Thomas Babington Macaulay
They understood his other eccentricities better.
"Tatterdemalion" by John Galsworthy
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### In poetry:

At first the 'busman smiled,
And rather liked the fun -
He merely smiled, that Hebrew child,
And said, "Eccentric one!"
"The Bishop and the Busman" by William Schwenck Gilbert
He sauntered on the southern isle
In garments of eccentric cut,
And, with his grim sardonic smile,
Would masticate his coco-nut.
"The Domain" by John Le Gay Brereton
There was once an eccentric old coon,
Who ate dynamite with a spoon,
The powder exploded--
And now there's a coon in the moon.
"Now There’s A Coon In The Moon" by Edwin Carty Ranck
This eccentricity that I name
Is, that whenever the bird would sing
It darts its black head under its wing,
And moistens its beak in--darling thing!--
A human heart that is broken with shame.
"A Little Bird That Everybody Knows" by Frances Fuller Victor
WEDGEWOOD.
And not without reason, madam. Never before have I heard of such a compound of
sagacity, courage, and eccentricity. Oh, I am all in a glow to see and converse
with the jolly old boy!
"The Maid Of Saxony; Or, Who's The Traitor? - Act I" by George Pope Morris
So is the world's eccentric round of joy complete
When happy tourist-traveler, no more to roam,
His fascinating, thrilling story shall repeat
To impecunious, luckless multitudes who greet
The tourist home.
"The Tourist" by Hattie Howard

### In news:

Supervisors endorse plan to rechristen Bay Bridge after 19th century eccentric.
Marge Schott's spats with baseball and her eccentric treatment of players and managers remained her legacy after she sold control of the Cincinnati Reds, tingeing the reaction to her death.
Be patient with Oak 63's eccentricities and you'll be richly rewarded.
Elizabeth Banks plays Effie Trinket, Katniss' flaky, eccentric adviser.
This first feature by character actor/theater director Terry Kinney addresses, once again, America's apparent surfeit of sweet- souled losers and eccentrics, replete with rueful indie muzak.
Syl Johnson (see the Eccentric Soul Revue).
At a 20-year remove, George Lucas' Star Wars comes off less as the work of a wizard than as the weird obsessional by-product of an eccentric American primitive.
Signs of spring at Bell's Eccentric Cafe: sunshine, Oberon, and Taps McFirkin.
The year was 1890 when an eccentric drug manufacturer named Eugene Schieffelin entered New York City's Central Park and released some 60 European starlings he had imported from England.
The word eccentric means, literally, "off-center".
These two books examine New Englanders who, like all true eccentrics, never thought of themselves as strange.
To play Bell's Eccentric Cafe, hasn't changed its stylistic exploration.
Chance, Burnsville schools' eccentric HR director, paid \$255,000 to leave.
The eccentric soul known as Cee Lo Green was born Thomas Callaway to ministers of the Baptist church, but he came into his own within a far more flamboyant congregation.
Eccentric Sebastopol author C. D Payne has big plans for the future, including a sequel to his popular novel about the misadventures of trouble-making teenager Nick Twisp.
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### In science:

Ogilvie (2001) demonstrated that a Navier-Stokes shear viscosity alone results in an overstability of the 2D disc, and since we wish to consider damping of eccentricity, we work with a bulk viscosity rather than a shear term.
The dynamics of eccentric accretion discs in superhump systems
Therefore the perturbed ﬂow can still be described as an eccentricity, now governed by a new eccentricity equation.
The dynamics of eccentric accretion discs in superhump systems
The dynamical term simply describes a precession of the eccentricity which also satisﬁes equation (34).
The dynamics of eccentric accretion discs in superhump systems
The term in the eccentricity gradient can be integrated by parts and, with the boundary conditions we use below, the boundary term vanishes and we obtain expressions containing integrals of real quantities only.
The dynamics of eccentric accretion discs in superhump systems
The two terms in the imaginary part behave as expected, with the resonant forcing acting to increase eccentricity and the bulk viscosity damping it (a negative eigenvalue implies a growing eccentricity).
The dynamics of eccentric accretion discs in superhump systems
Equation (37) is simply another form of the general relation for eccentricity growth and decay expressed by equation (35), in terms of a growth-rate eigenvalue.
The dynamics of eccentric accretion discs in superhump systems
The overall equation for the eccentricity can be simpliﬁed by considering a narrow ring centred on the 3:1 Lindblad resonance.
The dynamics of eccentric accretion discs in superhump systems
This is helpful because the equation now has an analytical solution and the behaviour of the eccentricity can be examined directly.
The dynamics of eccentric accretion discs in superhump systems
We solve the equations in a ring extending between x = −a and x = b, with the boundary conditions that the eccentricity gradient is zero at the edges of the ring.
The dynamics of eccentric accretion discs in superhump systems
With no resonance, the eccentricity distributions are simple cosine waves.
The dynamics of eccentric accretion discs in superhump systems
When the resonance is added a cusp develops at the resonance point in the centre of the ring, with a discontinuity in the eccentricity gradient.
The dynamics of eccentric accretion discs in superhump systems
As the resonance is made stronger the cusp becomes deeper and the wavenumber closer to the value where the eccentricity has a zero at the resonant point.
The dynamics of eccentric accretion discs in superhump systems
The eccentricity of narrow rings with different resonant strengths, showing the development of the cusp as W increases.
The dynamics of eccentric accretion discs in superhump systems
This counterintuitive behaviour arises because of the cusp, which, as shown by Fig. 1, deepens as the growth rate increases and leads to a low eccentricity at the resonant point.
The dynamics of eccentric accretion discs in superhump systems
Since the eccentricity growth here is proportional to the eccentricity itself, a low eccentricity slows the growth of the instability and allows the eccentricity to be damped away in the disc.
The dynamics of eccentric accretion discs in superhump systems
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