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

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 Darwin, Erasmus

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

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 Curtis, William

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 Carvalho, David Nunes

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

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

When the bands of folia are very fine and tortuous the structure is called helizitic.

From Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 2 "Gloss" to "Gordon, Charles George" by Various

Then, though its surface looks quite micaceous in the folia of it, when you try them with the knife, you will find you cannot break them away—— Kathleen.

From The Crown of Wild Olive also Munera Pulveris; Pre-Raphaelitism; Aratra Pentelici; The Ethics of the Dust; Fiction, Fair and Foul; The Elements of Drawing by Ruskin, John

The abrupt hillocks thus composed, as well as the highly inclined folia of the common varieties of gneiss, strike N.N.E. or a little more easterly, and S.S.W.

From Geological Observations on South America by Darwin, Charles

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 Darwin, Charles