Hypertext Webster Gateway: "folia"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Folium \Fo"li*um\, n.; pl. E. {Foliums}, L. {Folia}. [L., a
leaf.]
1. A leaf, esp. a thin leaf or plate.
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 x^{3} + y^{3} = axy.
Additional Hypertext Webster Gateway Lookup
Gateway by dict@stokkie.net
stock only wrote the gateway and does not have any control over the contents;
see the Webster Gateway FAQ,
and also the Back-end/database links and credits.