folium

[foh-lee-uh m]

noun, plural fo·li·a

[foh-lee-uh] /ˈfoʊ li ə/.

a thin leaflike stratum or layer; a lamella.
Geometry. a loop; part of a curve terminated at both ends by the same node. Equation: x3 + y3 = 3axy.

Origin of folium

1840–50; < New Latin, Latin: literally, a leaf

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for folium

Historical Examples of folium

In its leaves we have a good example of the folium mucronatum.
The Botanical Magazine, Vol. 13
William Curtis
Foliaceous, belonging to, or of the texture or nature of, a leaf (folium).
The Elements of Botany
Asa Gray
With Folium, in Latin, is rightly associated the word Flos; for the flower is only a group of singularly happy leaves.
Proserpina, Volume 1
John Ruskin
Reddish purple (folium) may be lowered with brown, and heightened with white lead.
The History, Theory, and Practice of Illuminating
M. Digby Wyatt
Item, mix folium with white lead, lower with folium, and heighten with white lead.
The History, Theory, and Practice of Illuminating
M. Digby Wyatt

British Dictionary definitions for folium

folium

noun plural -lia (-lɪə)

a plane geometrical curve consisting of a loop whose two ends, intersecting at a node, are asymptotic to the same line. Standard equation: x ³ + y ³=3a xy where x = y +a is the equation of the line
any thin leaflike layer, esp of some metamorphic rocks

Word Origin for folium

C19: from Latin, literally: leaf

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for folium

see folio.

folium in Medicine

folium

[fō′lē-əm]

n. pl. fo•li•a (-lē-ə)

A broad, thin, leaflike structure, as of the cerebellar cortex.

folium in Science

folium

[fō′lē-əm]

Plural folia

A thin, leaflike layer or stratum occurring especially in metamorphic rock.
A plane cubic curve having a single loop, a node, and two ends asymptotic to the same line. Also called folium of Descartes