ECCENTRICITY
eccentricity
(noun) strange and unconventional behavior
eccentricity
(noun) a circularity that has a different center or deviates from a circular path
eccentricity
(noun) (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”
Source: WordNet® 3.1
Etymology
Noun
eccentricity (countable and uncountable, plural eccentricities)
The quality of being eccentric or odd; any eccentric behaviour.
(mathematics) The ratio, constant for any particular conic section, of the distance of a point from the focus to its distance from the directrix.
(astronomy) The distance of the centre of a planet's orbit from the centre of the sun.
Source: Wiktionary
Ec`cen*tric"i*ty, n.; pl. Eccentricities. Etym: [Cf. F.
excentricité.]
1. The state of being eccentric; deviation from the customary line of
conduct; oddity.
2. (Math.)
Definition: The ratio of the distance between the center and the focus of
an ellipse or hyperbola to its semi-transverse axis.
3. (Astron.)
Definition: 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.
4. (Mech.)
Definition: The distance of the center of figure of a body, as of an
eccentric, from an axis about which it turns; the throw.
Source: Webster’s Unabridged Dictionary 1913 Edition