Noun
A leaf, esp. a thin leaf or plate.
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 x3 + y3 = axy.
Source: Webster's dictionaryMedieval codices are constructed in "gathers" which are folded (compare "folio", "leaf, page" ablative case of Latin folium), then stacked together like a newspaper and sewn together at the fold. Source: Internet
Increasing evidence suggests that this process may be slow in humans. citation Folate and folic acid derive their names from the Latin word folium, which means "leaf". Source: Internet
Pg. 139–140 Another blue often used in the Middle Ages was called tournesol or folium. Source: Internet
It also contains RadixPolugoniMutiflori helping in inflammation of the prostate (prostatitis) and Folium Nelumbinis Raises the Clear Yang of the Spleen. Source: Internet