Main Entry: ec·cen·tric·i·ty

Pronunciation: \ˌek-(ˌ)sen-ˈtri-sə-tē\

Function: noun

Inflected Form(s): plural ec·cen·tric·i·ties

Date: 1545

1 a : the quality or state of being eccentric b : deviation from an established pattern or norm; especially : odd or whimsical behavior
2 a : a mathematical constant that for a given conic section is the ratio of the distances from any point of the conic section to a focus and the corresponding directrix b : the eccentricity of an astronomical orbit used as a measure of its deviation from circularity