Definition of "folium" in English

noun

1. (rare) 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 thin sheet or plate of a foliated rock or mineral.

5. (anatomy) A lobe on a branching structure.

6. (geometry) 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.

7. (uncountable) Synonym of turnsole (“purple dye”).

8. (zoology) A symmetric pattern on the abdomen of some spiders.