Foliation definitions

fō'lē-ā'shən
The state of being in leaf.
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Decoration with sculpted or painted foliage.
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Decoration of an opening with cusps and foils, as in Gothic tracery.
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The set of layers visible in many metamorphic rocks as a result of the flattening and stretching of mineral grains during metamorphism.
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The act, process, or product of forming metal into thin leaf or foil.
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The act or process of coating glass with metal foil.
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The process of numbering consecutively the leaves of a book or manuscript.
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The leaves so numbered.
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A growing of or developing into a leaf or leaves; leaf formation.
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The state of being in leaf.
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The way leaves are arranged in the bud; vernation.
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The act or process of beating metal into layers.
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The process of backing glass as with metal foil to make a mirror.
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The consecutive numbering of leaves, rather than pages, of a book.
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A splitting into leaflike layers.
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The property of splitting into such layers.
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Such layers.
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A decorating with leaflike ornamentation.
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A leaflike decoration consisting of small arcs or foils.
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The set of layers visible in many metamorphic rocks as a result of the flattening and stretching of mineral grains during metamorphism.
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The process of forming into a leaf or leaves.
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The manner in which the young leaves are disposed within the bud.
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The act of beating a metal into a thin plate, leaf, foil, or lamina.
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The act of coating with an amalgam of tin foil and quicksilver, as in making looking-glasses.
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The enrichment of an opening by means of foils, arranged in trefoils, quatrefoils, etc.; also, one of the ornaments.
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The property, possessed by some crystalline rocks, of dividing into plates or slabs, which is due to the cleavage structure of one of the constituents, as mica or hornblende. It may sometimes include slaty structure or cleavage, though the latter is usually independent of any mineral constituent, and transverse to the bedding, it having been produced by pressure.
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(topology) A set of submanifolds of a given manifold, each of which is of lower dimension than it, but which, taken together, are coextensive with it.
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Origin of foliation

From French foliation, from Latin folium (“leaf”)

Sentence Examples

  • The development of foliation in shaly rocks is undoubtedly closely akin to the production of cleavage in slates.

  • The foliation is often parallel to the bedding, but may cross it obliquely or at right angles; or the bedding may be folded and contorted while the foliation maintains a nearly uniform orientation.

  • The difference between schists and gneisses is mainly that the latter have less highly developed foliation; they also, as a rule, are more coarse grained, and contain far more quartz and felspar, two minerals which rarely assume platy or acicular forms, and hence do not lead to the production of a fissile character in the rocks in which they are important constituents.

  • The varying texture of this rock, its irregular foliation and jointing, and its ramifying veins of pegmatite give it very unequal powers of resistance.

  • The phyllites (q.v.) form a middle term between this group and the slates; they consist usually of quartz, white mica and chlorite, and have much of the foliation and schistosity of the mica-schists.

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Words near foliation in the Dictionary