Folium of Descartes
"Folium of Descartes, with its asymptote. The equation is (4-y)(y-1)2 = 3x2y ... In geometry, a plane cubic curve having a crunode, and one real inflexion, which lies at infinity.
William Dwight Whitney The Century Dictionary: An Encyclopedic Lexicon of the English Language (New York, NY: The Century Co., 1911)
Courtesy the private collection of Roy Winkelman