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Ellice Islands
Ellicott City
ellipse
ellipsis
ellipsoid
elliptical
elliptical galaxy
elliptical polarization
ellipticity
Ellis Island
Ellsworth Land
elm
elm bark beetle
Elmhurst
Elmira
elmwood
Elmwood Park
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ellipticity

el·lip·tic·i·ty [ i lìp tíssətee ] (plural el·lip·tic·i·ties)


noun 
Definition:
 
deviation from circle or sphere: the deviation or degree of deviation of an ellipse or ellipsoid from a perfect circle or sphere. Ellipticity is measured as the ratio of the major axis to the minor axis of the ellipse or ellipsoid.

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