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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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.

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.

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
References in periodicals archive ?
Properly fit, a quality aftermarket barrel can considerably improve precision, with less slop and eccentric wear.
To change AR-15 barrels, you do need a couple special tools.
If you stack only as high as needed to utilize your space, the capacity increase may allow your cellar to reduce how high you stack your barrels for a more seismically stable layout.
Extra Savage barrel-nuts are really cheap, so I just leave them on the removed barrels, already set correctly for headspace.
2% compared with the same period in 2014, which reached 3,207,700 barrels.
It has two barrels, a smoothbore for bumping off Thanksgiving dinner and a rifled barrel for harvesting steaks and chops on the hoof.
M249: During both sustained fire (40 rounds per minute) and rapid fire (100 rounds per minute), change the barrel every 200 rounds.
The difference between Shrewsbury's barrels and Westboro's barrels is that our opening at the top of the barrel is smaller (for safety issues involving with children playing with them), that there is a louvered screen to catch the water (better water diversion than just a screen alone), and that our barrel's spigot is approximately 10 inches up from the bottom (this leaves some water in the bottom for weight, which prevents tipping or blowing away in strong winds)," Pratt said.
One can see from equation 2 that shear stress (usually in kPa) is directly proportional to the measured barrel pressure.
5 million barrels a day (15 percent of our total consumption in 2004).
Single barrel" means the bourbon comes from an unblended "honey" barrel handpicked by the master distiller, while "small batch" means it was created from a blend of barrels for a limited run of bottles.