Jisho

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Noun
1. eccentricity
Wikipedia definition
2. Eccentricity (mathematics)In mathematics, the eccentricity, denoted e or, is a parameter associated with every conic section. It can be thought of as a measure of how much the conic section deviates from being circular. In particular, The eccentricity of a circle is zero. The eccentricity of an ellipse which is not a circle is greater than zero but less than 1. The eccentricity of a parabola is 1. The eccentricity of a hyperbola is greater than 1.
Read “Eccentricity (mathematics)” on English Wikipedia
Read “離心率” on Japanese Wikipedia
Read “Eccentricity (mathematics)” on DBpedia

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