Folium ( la, folium, "leaf") may refer to * a leaf of a book: see

recto and verso ' is the "right" or "front" side and ''verso'' is the "left" or "back" side when text is written or printed on a leaf of paper () in a bound item such as a codex, book, broadsheet, or pamphlet. Etymology The terms are shortened from Latin ...

* Folium of Descartes, an algebraic curve *

Folium (spider) This glossary describes the terms used in formal descriptions of spiders; where applicable these terms are used in describing other arachnids. Links within the glossary are shown . Terms A Abdomen or opisthosoma: One of the two main body parts ...

, a marking on the abdomen of a spider

Brain anatomy

Folium (brain) The cerebellum (Latin for "little brain") is a major feature of the hindbrain of all vertebrates. Although usually smaller than the cerebrum, in some animals such as the mormyrid fishes it may be as large as or even larger. In humans, the cerebel ...

Folium vermis The folium vermis is a short, narrow, concealed band at the posterior extremity of the vermis The cerebellar vermis (from Latin ''vermis,'' "worm") is located in the medial, cortico-nuclear zone of the cerebellum, which is in the posterior fos ...

Botany

Turnsole Turnsole or folium was a dyestuff prepared from the annual plant ''Chrozophora tinctoria''. History Turnsole became a mainstay of medieval Illuminated manuscript, manuscript illuminators starting with the development of the technique for extracti ...

or folium, a dyestuff * Folium Phyllostachydis, processed leaves of bamboo * Hydrangeae Dulcis Folium, processed leaves of hydrangea {{disambig