Fo"li*um (?), n.; pl. E.
Foliums (#), L. Folia (#). [L., a
leaf.] 1. A leaf, esp. a thin leaf or
2. (Geom.) 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 =