Plural form of cycloid; multiple mathematical curves traced by points on rolling circles, or multiple cycloid-scaled fish.
From cycloid + -s (plural suffix). Standard pluralization of cycloid for mathematical or zoological contexts.
Cycloids were so captivating to 17th-century mathematicians that they sparked a mathematical competition—Pascal, Leibniz, and the Bernoulli brothers all raced to solve cycloid problems, which basically created the modern field of calculus.
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