limacons

/ˈlɪməsɑnz/
noun
  1. A type of mathematical curve shaped like a distorted circle, often with a loop or dimple.
    • Some limacons have a loop, while others are just slightly flattened.
    • In math class, we learned how to graph limacons using polar coordinates.
    • The limacon curve looks like a circle that has been pushed in on one side.
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