folium

Meanings

1. A leaf.
2. A leaf (2 pages) of a codex or manuscript.
3. A document that acts as the legal record of a transaction.
4. A certificate of title.
5. A thin sheet or plate of a foliated rock or mineral.
6. A lobe on a branching structure.
7. A leaf-like protrusion or lobule on one of the vermes of the cerebellum.
8. A curve of the third order, consisting of two infinite branches having a common asymptote. The curve has a double point, and a leaf-shaped loop.
9. Synonym of turnsole (“purple dye”).
10. A symmetric pattern on the abdomen of some spiders.

Etymology

From Latin folium (“leaf”). Doublet of foil and folio, distantly also with phyllo and phyllon.