Folium
Pronunciation : Fo"li*um, n.; pl. E. Foliums
Part of Speech : L.
Etymology : [L., a leaf.]
Definition : 1. A leaf, esp. a thin leaf or plate.
2. (Geom.)
Defn: 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.
Folia.
Source : Webster's Unabridged Dictionary, 1913