Noah Webster
Eccentricity
ECCENTRIC'ITY, noun Deviation from a center.
1. The state of having a center different from that of another circle.
2. In astronomy, the distance of the center of a planet's orbit from the center of the sun; that is, the distance between the center of an ellipsis and its focus.
3. Departure or deviation from that which is stated, regular or usual; as the eccentricity of a man's genius or conduct.
4. Excursion from the proper sphere.