Bible Dictionaries
Ellipticity

Webster's Dictionary

(n.) Deviation of an ellipse or a spheroid from the form of a circle or a sphere; especially, in reference to the figure of the earth, the difference between the equatorial and polar semidiameters, divided by the equatorial; thus, the ellipticity of the earth is /.

Bibliography Information
Webster, Noah. Entry for 'Ellipticity'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​e/ellipticity.html. 1828.