folium

English

Etymology

Latin, a leaf.

Noun

folium (plural foliums or folia)

1. A leaf, especially a thin leaf or plate.
2. (geometry) 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.

Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for folium in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.)

---

Latin

Etymology

From Proto-Indo-European *bʰolh₃yom (“leaf”), from *bʰleh₃- (“blossom, flower”). Alternatively from *dʰolyom (*dʰel- (“be green”)), whence Welsh dail and Old Irish duille.

Pronunciation

• (Classical) IPA^(key): /ˈfo.li.um/, [ˈfɔ.li.ũ]
• (Ecclesiastical) IPA^(key): /ˈfo.li.um/, [ˈfoː.li.um]

Noun

folium n (genitive foliī); second declension

1. a leaf
2. a petal
3. a sheet or leaf of paper
4. (figuratively) trifle, thing of no consequence

Declension

Second declension.

Case	Singular	Plural
nominative	folium	folia
genitive	foliī	foliōrum
dative	foliō	foliīs
accusative	folium	folia
ablative	foliō	foliīs
vocative	folium	folia

Derived terms

Terms derived from folium

• acrifolius
• aquifolius
• exfoliāris
• folia

• foliāceus
• foliamen (Mediaeval)
• foliātum

• foliātus
• foliōsus
• latifolius

Related terms

• foliātilis
• foliātūra

Descendants

• Aragonese: fuella
• Aromanian: foalji
• Asturian: fueya
• Catalan: full, fulla, foli (borrowed)
• Dalmatian: fualja
• English: foil, folio (borrowed)
• Franco-Provençal: fôlye
• French: feuille, folio (borrowed)
• Friulian: fuee
• Galician: folla
• Istro-Romanian: foľe

• Italian: foglia, foglio
• Norman: fielle
• Occitan: fuèlh, fuèlha, huelha
• Piedmontese feuj
• Portuguese: folha, folho, fólio (borrowed)
• Romanian: foaie, foliu (borrowed)
• Romansch: fegl, figl, föglia
• Sardinian: fógiu, fògia, folla, foza
• Sicilian: fogghia, fogghiu
• Spanish: hoja, folio (borrowed)
• Venetian: fogia, foja, fogio, fojo
• Walloon: foye

References

• fŏlĭum in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• folium in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• folium in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition, 1883–1887)
• fŏlĭum in Gaffiot, Félix (1934) Dictionnaire Illustré Latin-Français, Hachette, page 678/1
• “folium” on page 719/3 of the Oxford Latin Dictionary (1st ed., 1968–82)
• Niermeyer, Jan Frederik (1976), “folium”, in Mediae Latinitatis Lexicon Minus (in Latin), Leiden, Boston: Brill, page 439/2