"eccentricity" in the noun sense
1. eccentricity
strange and unconventional behavior
2. eccentricity
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. eccentricity
a circularity that has a different center or deviates from a circular path
Source: WordNet® (An amazing lexical database of English)
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