squircle

English

A line drawing of a square with rounded corners
A squircle, showing its generally square shape with broad rounded corners

Etymology

Blend of square +‎ circle.

Pronunciation

  • Rhymes: -ɜː(ɹ)kəl
  • Audio (US):(file)

Noun

squircle (plural squircles)

  1. (algebraic geometry) A closed quartic curve having properties intermediate between those of a square and a circle.
    • 1985, Hospital Practice, volume 20, page 131:
      At the NCI, the applicator shapes most often used are circular or "squircular." The squircle applicator has one square and one round end, and it is beveled so that the circular end is longer.
  2. An object whose shape combines a circle and a square.
    • 1985, Hospital Practice, volume 20, page 131:
      At the NCI, the applicator shapes most often used are circular or "squircular." The squircle applicator has one square and one round end, and it is beveled so that the circular end is longer.
    • 2026 October, Dee-Ann Durbin, “Judge says Smucker’s lawsuit against Trader Joe’s over frozen PB&J can proceed”, in The Associated Press‎[1], archived from the original on 3 September 2026:
      Smucker sued Trader Joe’s in federal court in Ohio last fall, claiming Trader Joe’s committed a trademark violation when it introduced frozen peanut butter and jelly sandwiches with the same round shape and crimped edges as Uncrustables. The lawsuit further alleged that Trader Joe’s put its crustless PB&Js peanut in packaging that too closely resembled the coloring of an Uncrustables box and featured a similar photograph of a sandwich with a bite taken out of one side. In court filings, Trader Joe’s said its frozen sandwiches aren’t round but shaped as “squircles,” or square sandwiches with rounded edges.

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