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AS

 (L.)
au´ris sinis´tra (left ear).

As

Symbol for arsenic.

AS

[L.] au´ris sinis´tra (left ear).

AS

aortic stenosis; arteriosclerosis.

As

arsenic.

As

symbol for the element arsenic.

AS

abbreviation for aortic stenosis.

As

The profile area of a slab-sectioned corpuscle or nucleus, a quantity measurable by image cytometry.

AS

Abbreviation for:
absence seizure
absence of seizures
accessory spleen
acoustic schwannoma
acoustic stimulation
active surveillance
acute stress
Adams-Stokes
adenosquamous carcinoma
adult services
allele specific
Alport syndrome
ambulatory surgery
anabolic steroid
anal sphincter
anaphylactic shock
androgen suppression
angiosarcoma
anionic surfactant
ankylosing spondylitis
anovulatory syndrome
anterior scalene
anteroseptal
antisense
antiserum
aortic stenosis
arteriosclerosis
artificial sweetener
asbestos
ascending aorta
Ascaris suum
ascorbic acid
aseptic meningitis
asparagine synthetase
Asperger syndrome
assisted suicide
Associate of Science
Associate Specialist (Medspeak-UK) 
atherosclerosis
atrial septum
atropine sulphate
attempted suicide
audiogenic seizure
audiovisual stimulation

As

Symbol for arsenic

ankylosing spondylitis

; AS autoimmune disease of young men of human leukocyte antigen (HLA) B27 tissue type, characterized by high titres of tumour necrosis factor, progressive spondyloarthropathy, inflammatory back pain, limited spinal mobility, limited chest expansion and sacroiliitis; typically presenting with bursitis, buttock and heel pain, marked early-stage systemic fatigue, late-stage increased spinal curvature and spinal ankylosis ('bamboo' spine); foot problems (e.g. pain, plantar and posterior heel spur formation, soft-tissue swelling and bursitis) occur in the earlier stages; late-stage foot symptoms include joint erosions, periosteal proliferation and anklyosis due to joint margin exostoses (Table 1)
Table 1: Common features of the range of types of sero-negative inflammatory arthritis
FeatureComment
Leukocyte antigen type90% of patients with sero-negative arthritis test positive for human leukocyte antigen (HLA) B27
Skeletal involvementAxial skeleton/spinal involvement; with back pain (common presenting first symptom)
EnthesopathyInflammation at insertions of ligaments/tendons (posterior calcaneum, plantar calcaneum, base of fifth metatarsal, forefoot)
Soft-tissue swellingsLocalized swelling at Achilles tendon insertion
Bursitis of congenital/adventitious bursae
SynovitisDactylitis/'sausage' toe
Generalized swelling of fore foot
VasculitisNote: Does not tend to affect foot in sero-negative arthritides
RadiographsBone/periosteal fluffy/'whiskery' proliferation
New bone/spur formation at entheses, secondary to inflammation

As

chemical symbol, arsenic.
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References in periodicals archive ?
The NFPA 13: Installation of Sprinkler Systems outlines the design requirements of automatic sprinkler systems in modern records storage facilities.
Ware Fire Chief Thomas Coulombe has sat on the Automatic Sprinkler Appeals Board, which hears appeals from business owners ordered to install sprinklers because of occupancy or significant remodeling, since 2001.
Automatic sprinklers use more water in an hour than the average family uses in three days - and some people leave them on when they go on holiday
Automatic sprinklers became more widely used and accepted in the 1970s, as their positive impact on life safety and property conservation were more widely understood.
Fire service officials estimate it would cost about pounds 5,000 to fit a small primary school with an automatic sprinkler system.
Depending on insurance market conditions, there may be opportunities for reduced property insurance premiums if a facility is provided with automatic sprinkler protection.
The Run Time Calculator is intended to provide homeowners with a better understanding of the unique watering needs of their landscape and to help them refine the operation of their automatic sprinkler system to deliver the right amount of water at the right time," said Dave Johnson, Rain Bird's corporate marketing director.
The National Citizens' Coalition for Nursing Home Reform charged that federal policy contributed to the deaths and injuries, pointing out that in January 2003 CMS adopted new Life Safety Code regulations that allow older buildings to operate without an automatic sprinkler system.
North Wales Fire Service is urging householders to consider fitting automatic sprinkler systems like those which have been common in offices for many years.
The BAS is also equipped with a fire system gateway for integration with the center's automatic sprinkler system.
irrigation of lawns via automatic sprinkler systems (all types of above and below ground sprinkler systems); washing of vehicles except in a commercial car wash; and washing of exterior building surfaces, parking lots, driveways or sidewalks, except as necessary to apply paint, preservatives, stucco, pavement or cement.

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