👉 In mathematics, the term "unicuspid" refers to a particular type of circle that is used in the construction and study of Archimedes' Conjecture, which states that there exists an infinite number of circles inscribed within any given square. These circles are known as the unicuspidal circles because they form a unique, closed shape with infinitely many sides. Unicuspidal circles have been found on various mathematical objects such as the Euclidean plane and the hyperbolic plane