barrel

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barrel:

see English units of measurementEnglish units of measurement,
principal system of weights and measures used in a few nations, the only major industrial one being the United States. It actually consists of two related systems—the U.S.
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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/

barrel

[′bar·əl]
(design engineering)
A container having a circular lateral cross section that is largest in the middle, and ends that are flat; often made of staves held together by hoops.
A piece of small pipe inserted in the end of a cartridge to carry the squib to the powder.
That portion of a pipe having a constant bore and wall thickness.
(mechanics)
Abbreviated bbl.
The unit of liquid volume equal to 31.5 gallons (approximately 119 liters).
The unit of liquid volume for petroleum equal to 42 gallons (approximately 158 liters).
The unit of dry volume equal to 105 quarts (approximately 116 liters).
A unit of weight that varies in size according to the commodity being weighed.
(naval architecture)
The central part of a windlass or capstan about which the cable is wound.
(optics)
A tapering cylindrical housing which contains the lenses of a camera and the iris diaphragm.
(ordnance)
The cylindrical metallic part of a gun which controls the initial direction of a projectile.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

barrel

1. A weight measure for portland cement in the US, corresponding to 376 pounds net; this measure is now obsolete.
2. (US) A vessel which holds 311/2 gal of liquid.
3. That portion of a pipe having a constant bore and wall thickness.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

barrel

1. a unit of capacity used in brewing, equal to 36 Imperial gallons
2. a unit of capacity used in the oil and other industries, normally equal to 42 US gallons or 35 Imperial gallons
3. the trunk of a four-legged animal
4. the quill of a feather
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
During the month of June, the average price realised by Oman fell by 0.6 per cent to touch US$64.3 per barrel. Oman's crude fetched a price of US$63.9 per barrel in the same month of 2018.
"Daily oil production amounted to 768,000 barrels in May.
If the shooting sport or hunting scenario you participate in requires such a cartridge or creates the need for rapid fire, barrel selection becomes profoundly important.
While most of my barrel work revolved around 1911 handguns, this changed with the introduction of the Glock as the factory's polygonal rifling wasn't compatible with lead bullets.
A new interlocking barrel pallet system is the latest offering by Seismarack Systems, which is produced by Worksafe Technologies in Valencia, Calif.
To change AR-15 barrels, you do need a couple special tools.
As an American, I have relatively little experience with drillings, but I have noticed the bottom rifle barrel tends to be super-accurate, almost certainly because it's fully supported by the upper barrels.
has launched the Bishop's Barrel series, a line of limited-edition barrel aged specialty beer that will only be available in on-premise accounts.
The US Atlantic Coast (USAC) saw the largest build, with stocks rising 1.216 million barrels to 13.244 million barrels.
The average daily crude production stood at 862,700 barrels during the first 11 months of 2010 against 809,600 barrels during the corresponding period in 2009, a rise of 6.6 per cent.