Folium (Latin: folium, "leaf"), plural folia, may refer to
- a leaf of a book: see recto and verso
- Folium of Descartes, an algebraic curve
- Folium (spider), a marking on the abdomen of a spider
Brain anatomy
editBotany
edit- Turnsole or folium, a dyestuff
- Folium Phyllostachydis, processed leaves of bamboo
- Hydrangeae Dulcis Folium, processed leaves of hydrangea