n.
Pronunciation: ˌ ek-( ˌ )sen- ' tri-s ə -t ē
Function: noun
Inflected Form: plural -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