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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 ?
Guests were given a private tour of the Spring 2018 collection featuring West Elm and Pottery Barn.
This is the part of barn doors that so many fall in love with, and a quick search on Pinterest or other websites will inspire you
Regardless of their level of affection, to keep your barn cats healthy, you'll need to think about vaccinations, spaying and neutering, and even feeding.
Conroy said that after buying Country Outfitter, Boot Barn now owns three of the top four highest-trafficked websites in the Western and work wear category.
The barn is licensed for wedding ceremonies for up to 80 wedding guests and a maximum of 80 guests for a formal, seated daytime reception and up to 120 guests for a less formal evening celebration.
In addition, Jennifer Kellor has been named president of the Pottery Barn Kids and PBteen brands, also reporting to Alber.
In New England, English barns were further adapted into larger, timber-framed structures, which became known as the Yankee barn.
once a leading manufacturer of barn and stable equipment.
Manchester round barn built by Duncan Horace in 1908 and the 1819 Poorman barn, which has been a part of the family legacy for multiple generations, are among several barns featured in the film.
Helen Cottam, of the Staffordshire Barn Owl Action Group, told the Sunday Mercury: "Last year some pairs attempted to breed but they abandoned nests and some chicks died.
We decided the barn owl project could benefit from Bamburgh's bag tax which will see all the money raised after tax being donated to the scheme.
A survey of 23 culverts occupied by barn swallows in northeastern Texas in 2000 yielded no breeding cave swallows (Kosciuch et al.