eccentricity

英[,eksen'trɪsɪtɪ] 美[,ɛksɛn'trɪsəti]

1. strange and unconventional behavior

2. (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"

3. a circularity that has a different center or deviates from a circular path