spar

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spar.

For dogtooth spar, see calcitecalcite
, very widely distributed mineral, commonly white or colorless, but appearing in a great variety of colors owing to impurities. Chemically it is calcium carbonate, CaCO3, but it frequently contains manganese, iron, or magnesium in place of the calcium.
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; for fluorspar, see fluoritefluorite
or fluorspar
, mineral appearing in various colors, e.g., green, yellow-brown, rose, and red. Chemically, it is calcium fluoride, CaF2. Its crystals, commonly cubic, are transparent or translucent and under certain conditions exhibit fluorescence.
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; for heavy spar, see baritebarite
, barytes
[New Lat., from barium], or heavy spar,
a white, yellow, blue, red, or colorless mineral. It is a sulfate of barium, BaSO4, found in nature as tabular crystals or in granular or massive form and has a high specific gravity.
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; for satin spar, see calcitecalcite
, very widely distributed mineral, commonly white or colorless, but appearing in a great variety of colors owing to impurities. Chemically it is calcium carbonate, CaCO3, but it frequently contains manganese, iron, or magnesium in place of the calcium.
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 and gypsumgypsum
, mineral composed of calcium sulfate (calcium, sulfur, and oxygen) with two molecules of water, CaSO4·2H2O. It is the most common sulfate mineral, occurring in many places in a variety of forms. A transparent crystalline variety is selenite.
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. See also Iceland sparIceland spar,
colorless variety of crystallized calcite, characterized by its properties of transparency and double refraction. It is used chiefly in the manufacture of Nicol prisms, which are essential parts of polarizing microscopes and other optical instruments.
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 and feldsparfeldspar
or felspar
, an abundant group of rock-forming minerals which constitute 60% of the earth's crust. Chemically the feldspars are silicates of aluminum, containing sodium, potassium, iron, calcium, or barium or combinations of these elements.
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.
The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Spar

 

the equipment above the deck of a ship that is used for mounting loading gear, signals, lights, and radio antennas. Spars are also used as observation and communication posts. On modern self-propelled ships, spars include the masts, topmasts, yards, gaffs, and loading booms. On sailing ships, spars are used for raising, turning, and furling the sails.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

spar

[spär]
(aerospace engineering)
A principal spanwise member of the structural framework of an airplane wing, aileron, stabilizer, and such; it may be of one-piece design or a fabricated section.
(mining engineering)
A small clay vein in a coal seam.
(mineralogy)
Any transparent or translucent, nonmetallic, light-colored, readily cleavable, crystalline mineral; examples are calespar and fluorspar.
(naval architecture)
A long, round stick of steel or wood, often tapered at one or both ends, and usually a part of a ship's masts or rigging.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

spar

2. A bar for fastening a gate or door.
3. A heavy round timber.
4.See brotch.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

spar

spar
A principal lateral, span-wise load-carrying member of an airplane or control surface.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved

spar

1
1. 
a. any piece of nautical gear resembling a pole and used as a mast, boom, gaff, etc.
b. (as modifier): a spar buoy
2. a principal supporting structural member of an aerofoil that runs from tip to tip or root to tip

spar

2
an unaggressive fight

spar

any of various minerals, such as feldspar or calcite, that are light-coloured, microcrystalline, transparent to translucent, and easily cleavable
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

SPAR

Early system on Datatron 200 series. Listed in CACM 2(5):16 (May 1959).
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)
References in periodicals archive ?
LOVELY BUBBLY Kernan's Eurospar staff in Co Donegal yesterday
| Money troubles: the closure of the He said: "The cashpoints in Eurospar and the Co-op are both inside and these stores close at 4pm on Sunday, while the outside cashpoint at McColls was out of order with no cash back in store.
Dolgellau and Blaenau Ffestiniog stores were the first in Wales to bear the EUROSPAR brand three years ago.
He said fresh fish suppliers Gill's Plaice, of Aberdovey in Gwynedd, is just one of the Welsh companies to benefit from the scheme, which helped win a contract to supply vacuum-packed fish to Eurospar outlets.
Kenneth Adam Hyde, 39, pleaded guilty at Dolgellau magistrates court to the theft of goods valued at PS20 from Eurospar, Blaenau Ffestiniog, on February 7 and theft of goods valued at PS16, two days later.
Retailer Conrad Davies organised his own Welsh Food and Drink Fortnight to thank customers at his Eurospar stores in Dolgellau and Blaenau Ffestiniog, and his Spar store in Pwllheli.
* Conrad Davies of Eurospar says, 'The producers that have been most successful are those that have held special promotions and tastings in the stores'
The [euro]3 Quick Pick was bought last Tuesday at EuroSpar in Kilkenny's New Park Shopping Centre.
GWYNEDD:EUROSPAR Dolgellau, EUROSPAR Blaenau Ffestiniog, SPAR Abersoch, SPAR Bala, SPAR Barmouth, SPAR Bethesda, SPAR Caernarfon, SPAR Llanberis,SPAR Nefyn, SPAR Penrhyn, Penrhyndeudraeth, SPAR Porthmadog, SPAR Pwllheli, SPAR Tremadog, Porthmadog, SPAR Y Maes, Pwllheli.
In August 2009 Conrad's Blaenau Ffestiniog Eurospar was the first to open in Wales before a fortnight later the Dolgellau branch also started trading.