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3 definitions found
 for Barrel vault
From The Collaborative International Dictionary of English v.0.48 :

  Vault \Vault\ (v[add]lt; see Note, below), n. [OE. voute, OF.
     voute, volte, F. vo[^u]te, LL. volta, for voluta, volutio,
     fr. L. volvere, volutum, to roll, to turn about. See
     Voluble, and cf. Vault a leap, Volt a turn, Volute.]
     [1913 Webster]
     1. (Arch.) An arched structure of masonry, forming a ceiling
        or canopy.
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              The long-drawn aisle and fretted vault. --Gray.
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     2. An arched apartment; especially, a subterranean room, used
        for storing articles, for a prison, for interment, or the
        like; a cell; a cellar. "Charnel vaults." --Milton.
        [1913 Webster]
              The silent vaults of death.           --Sandys.
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              To banish rats that haunt our vault.  --Swift.
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     3. The canopy of heaven; the sky.
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              That heaven's vault should crack.     --Shak.
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     4. [F. volte, It. volta, originally, a turn, and the same
        word as volta an arch. See the Etymology above.] A leap or
        bound. Specifically:
        (a) (Man.) The bound or leap of a horse; a curvet.
        (b) A leap by aid of the hands, or of a pole, springboard,
            or the like.
            [1913 Webster]
     Note: The l in this word was formerly often suppressed in
           [1913 Webster]
     Barrel vault, Cradle vault, Cylindrical vault, or
     Wagon vault (Arch.), a kind of vault having two parallel
        abutments, and the same section or profile at all points.
        It may be rampant, as over a staircase (see Rampant
        vault, under Rampant), or curved in plan, as around the
        apse of a church.
     Coved vault. (Arch.) See under 1st Cove, v. t.
     Groined vault (Arch.), a vault having groins, that is, one
        in which different cylindrical surfaces intersect one
        another, as distinguished from a barrel, or wagon, vault.
     Rampant vault. (Arch.) See under Rampant.
     Ribbed vault (Arch.), a vault differing from others in
        having solid ribs which bear the weight of the vaulted
        surface. True Gothic vaults are of this character.
     Vault light, a partly glazed plate inserted in a pavement
        or ceiling to admit light to a vault below.
        [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 :

  Barrel \Bar"rel\ (b[a^]r"r[e^]l), n.[OE. barel, F. baril, prob.
     fr. barre bar. Cf. Barricade.]
     1. A round vessel or cask, of greater length than breadth,
        and bulging in the middle, made of staves bound with
        hoops, and having flat ends or heads; as, a cracker
        barrel. Sometimes applied to a similar cylindrical
        container made of metal, usually called a drum.
        [1913 Webster +PJC]
     2. The quantity which constitutes a full barrel. This varies
        for different articles and also in different places for
        the same article, being regulated by custom or by law. A
        barrel of wine is 311/2 gallons; a barrel of flour is 196
        [1913 Webster]
     3. A solid drum, or a hollow cylinder or case; as, the barrel
        of a windlass; the barrel of a watch, within which the
        spring is coiled.
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     4. A metallic tube, as of a gun, from which a projectile is
        discharged. --Knight.
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     5. A jar. [Obs.] --1 Kings xvii. 12.
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     6. (Zool.) The hollow basal part of a feather.
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     Barrel bulk (Com.), a measure equal to five cubic feet,
        used in estimating capacity, as of a vessel for freight.
     Barrel drain (Arch.), a drain in the form of a cylindrical
     Barrel of a boiler, the cylindrical part of a boiler,
        containing the flues.
     Barrel of the ear (Anat.), the tympanum, or tympanic
     Barrel organ, an instrument for producing music by the
        action of a revolving cylinder.
     Barrel vault. See under Vault.
        [1913 Webster]

From WordNet (r) 3.0 (2006) :

  barrel vault
      n 1: the simplest form of vault; a single continuous arch

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