SG Heritage Dictionary

Folium [Noun] Webster's Dictionary 1913

1. A leaf, esp. a thin leaf or plate.

2. A curve of the third order, consisting of two infinite branches, which have a common asymptote. The curve has a double point, and a leaf-shaped loop; whence the name. Its equation is x3 + y3 = axy.

Foliums [Plural] Webster's Dictionary 1913

of Folium