folium

American  

[foh-lee-uhm] / ˈfoʊ li əm /

noun

• folia
  plural

1. a thin leaflike stratum or layer; a lamella.

2. Geometry. a loop; part of a curve terminated at both ends by the same node. Equation: x 3 + y 3 = 3 axy.

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folium British  

/ ˈfəʊlɪəm /

noun

1. 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

2. any thin leaflike layer, esp of some metamorphic rocks

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folium Scientific  

/ fō′lē-əm /

• folia
  plural

1. A thin, leaflike layer or stratum occurring especially in metamorphic rock.

2. A plane cubic curve having a single loop, a node, and two ends asymptotic to the same line.

3. Also called folium of Descartes

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Other Word Forms

Noun Inflected Forms

• folia
  plural

Etymology

Origin of folium

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

Example Sentences

See Examples For:

folium folia

One suggestion, based on a supposed similar use of Fr. fleuret, literally a “little flower,” for the weapon, is that foil means a leaf, and must be referred in origin to Lat. folium.

From Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 5 "Fleury, Claude" to "Foraker" by Various

Fibres from white core of folium ending in molecular layer in connexion with the dendrites of the cells of Purkinje.

From Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 4 "Bradford, William" to "Brequigny, Louis" by Various

Hence originates our term "leaves" of a book which in the Latin form folium has also given us the modern term folio.

From Forty Centuries of Ink or, a chronological narrative concerning ink and its backgrounds, introducing incidental observations and deductions, parallels of time and color phenomena, bibliography, chemistry, poetical effusions, citations, anecdotes and curiosa together with some evidence respecting the evanescent character of most inks of to-day and an epitome of chemico-legal ink. by David Nunes Carvalho

The leaf of this plant was first used for paper, whence the word paper; and leaf, or folium, for a fold of a book.

From The Botanic Garden. Part II. Containing the Loves of the Plants. a Poem. With Philosophical Notes. by Erasmus Darwin

It is more remarkable for the singularity of its foliage than the beauty of its blossoms; the former exhibit a very good example of the folium pedatum of Linnæus, whence its name.

From The Botanical Magazine, Vol. 3 Or, Flower-Garden Displayed by William Curtis

Look with insight into a small corner of the musical past, we learn from Savall, and history itself is folia writ large.

From Los Angeles Times ● Feb. 3, 2020

The minerals retain their positions in folia ranging in the usual direction; and fractured quartz veins may be traced from the solid rock, running for some distance into the softened, mottled, highly coloured, argillaceous mass.

From Geological Observations on South America by Charles Darwin

Hence I am led to believe, that most of the so-called beds are of the nature of complex folia, and have not been separately deposited.

From Geological Observations on South America by Charles Darwin

When the increased development occurs at the margin of the leaves, especially, the result is a wavy or crisped appearance, "folia undulata, vel crispa."

From Vegetable Teratology An Account of the Principal Deviations from the Usual Construction of Plants by Maxwell T. Masters

The folia are curved and highly inclined, generally dipping eastward.

From Geological Observations on South America by Charles Darwin