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barn (b),

A unit of area for effective cross-section of atomic nuclei with respect to atomic projectiles; equal to 10-24 cm2.
[fr. "big as the side of a barn" by humorous comparison with much smaller areas]
A unit of area—10–24 cm2—for the effective cross-section of atomic nuclei; barns indicate the cross-sectional area in which atomic, nuclear, and particle interactions occur


Bilateral acute retinal necrosis Ophthalmology A condition characterized by herpes virus-induced anterior and posterior uveitis, papillitis with retinal detachment 1-3 months after onset, of which only 50% are bilateral. See Herpes.


a building usually intended to house animals for long periods during the winter season. Marked by an infinite variety of designs and internal fittings, they usually contain a feed storage area, often as a haymow or loft in a top storey, and animal stalls and handling facilities such as a milking parlor on the ground floor.

free stall barn
cattle are free to enter unoccupied stalls.
barn itch
barn rat
a horse that shows eagerness or determination to return to the stable. See also agoraphobia.
barn sheet
a sketchy method of recording events, especially reproductive ones, in the lives of the inmates of the barn. Fixed to the barn wall it does provide an opportunity to record events as they happen, but suffers the obvious disadvantage of exposure to disfiguring and obscuring materials, especially fly droppings and cow manure. Its design, aimed at encouraging maximum data storage in minimal space, is a test for farmer ingenuity. Called also shed sheet.
References in periodicals archive ?
Those behind it say Tower Hill Barns has a casual, informal feel which allows them the flexibility to help make your wedding your own.
The first barns were not American by design, but were European-style longhouses that included stables and sleeping quarters.
Like the windmill, the barn is an enduring icon of farm life--but also like windmills, barns are steadily disappearing from the rural landscape.
This special program is free to the public and sponsored by Friends of Ohio Barns and the Upper Arlington Parks & Recreation Department.
The main farmhouse offers further potential (subject to necessary consents) to further extend into the attached barns to create a substantial five bedroom three bathroom property and currently consists of: entrance lobby, farmhouse dining kitchen, living room, rear hall, three good size bedrooms, bathroom, attached open garage, stable barn, tack room, workshop/barn with large barn loft above, barn store, home office with wc, yard space with parking and pleasant gardens.
Changes in agricultural techniques and the demolition of barns - a favoured nesting site - have also played a part in the worrying decline.
With many former barns being converted into holiday accommodation or refurbished, nesting sites for barn owls are becoming increasingly scarce.
They may have once been filled with odorous animals, rusting equipment or packed to the rafters with hay, but barns have now become highly desirable accommodation.
Barns: From the Land of Enchantment" is a collection of fifty black-and-white drawings of several particular barns throughout the state of New Mexico, as author Jerry R.
RAWALPINDI, March 09, 2012 (Frontier Star): Non shifting of cattle barns from thickly populated areas of city has posed healthy hazards.
Pierce Barn," as it's known, is a landmark in Cottage Grove - not because it's one of the last standing barns in city limits but because of the hand-painted mural gracing its western face, advertising "Dr.
Record numbers of barn owls have been found and reported to wildlife groups by the public, with birds often being discovered near to their roosting sites in barns and farm out-buildings.