folium
noun
folium is a noun meaning “A leaf” (English Wiktionary, September 2026). It is spelled F-O-L-I-U-M, and it appears about once in every 37 million words in written English (wordfreq, 2021 data). The plural of folium is foliums or folia.
What does folium mean?
noun
- 1
rareA leaf.
- 2
A leaf (2 pages) of a codex or manuscript.
- 3
A document that acts as the legal record of a transaction.
- 4
A certificate of title.
- 5
A thin sheet or plate of a foliated rock or mineral.
- 6
A lobe on a branching structure.
- 7
A leaf-like protrusion or lobule on one of the vermes of the cerebellum.
- 8
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.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How do you pronounce folium?
- US
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Flame,_not_lame-folium.wav, Wikimedia Commons (author and licence on each file's page).
Forms of folium
- foliums plural
- folia plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How common is folium?
Folium appears about once in every 37 million words in written English, the 187,122nd most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
Where does folium come from?
From Latin folium (“leaf”). Doublet of foil and folio, distantly also with phyllo and phyllon.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).