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folium

[foh-lee-uh m]
noun, plural fo·li·a [foh-lee-uh] /ˈfoʊ li ə/.
  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: x3 + y3 = 3axy.
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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

  • 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).

  • With Folium, in Latin, is rightly associated the word Flos; for the flower is only a group of singularly happy leaves.

  • Reddish purple (folium) may be lowered with brown, and heightened with white lead.

  • Item, mix folium with white lead, lower with folium, and heighten with white lead.

British Dictionary definitions for folium

folium

noun plural -lia (-lɪə)
  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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Word Origin

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

n.

see folio.

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Online Etymology Dictionary, © 2010 Douglas Harper
folium in Medicine

folium

(fō′lē-əm)
n. pl. fo•li•a (-lē-ə)
  1. A broad, thin, leaflike structure, as of the cerebellar cortex.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
folium in Science

folium

[fō′lē-əm]
Plural folia
  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. Also called folium of Descartes
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.