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Wikipedia definition
1. Logarithmic spiralA logarithmic spiral, equiangular spiral or growth spiral is a special kind of spiral curve which often appears in nature. The logarithmic spiral was first described by Descartes and later extensively investigated by Jacob Bernoulli, who called it Spira mirabilis, "the marvelous spiral".
Read “Logarithmic spiral” on English Wikipedia
Read “対数螺旋” on Japanese Wikipedia
Read “Logarithmic spiral” on DBpedia

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