an appearance that has been spoiled or is misshapen; "there were distinguishing disfigurements on the suspect's back"; "suffering from facial disfiguration"
a circularity that has a different center or deviates from a circular path
(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"