folium

noun foliums · folia

1. countable, rare, uncountable A leaf. 278.0 common walnut-tree folium
2. countable, uncountable A leaf (2 pages) of a codex or manuscript. But Barwick and Robinson both investigated V, and inform us that V leaves almost a full folium vacant (only the first two lines of folium 227 being occupied by the text before the lacuna).
3. countable, uncountable A document that acts as the legal record of a transaction. Giving tallies was a royal mode of contracting debts by our early sovereigns, as Exchequer bills have been the means of raising loans in our times: indeed, the Exchequer bill was the counter-tally, or folium of the tally; and the court of Exchequer has existed in its late order since the days of Edw
4. countable, especially, uncountable A certificate of title. There may nevertheless be a separate certificate and folium for any derived estate deed.
5. countable, uncountable A thin sheet or plate of a foliated rock or mineral. By varying the supposed angle of the tilt, our previously inclined folia can be thrown into any angle between 26 degrees, which is the least possible angle, and 90 degrees; but if a small inclination be thus given to them, their point of dip will depart far from the north, and therefore not accord w
6. countable, uncountable A lobe on a branching structure. The folia of these project considerably beyond the level of the soft cœnenchyma, and produce a very rugose appearance.
7. countable, uncountable A leaf-like protrusion or lobule on one of the vermes of the cerebellum. The vermis portion of lobule C₃ remains small, and still consists of only one folium.
8. countable, uncountable 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. These circular cubics are Newton's defective hyperbolae, with a diameter, species 39, 41, 45; the ampullate cubic represents the folium of the unipartite quartic, and the ampaniform the bipartite quartic.
9. uncountable Synonym of turnsole (“purple dye”). Folium is thus described . "Folium is used for dying cloths and is a red colour, and another kind is purple, and another is blue.

   Similar: turnsole

10. countable, uncountable A symmetric pattern on the abdomen of some spiders. The folium of silvatica has a row of oblique black markings along the edge on each side, while in angulata it is evenly notched.