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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 ?
Note: The TT Assen races take place on Saturday, 25 June.
According to Assen, FocalPoint Canada strives to not only help the business individual execute critical business skills, but also understand why these concepts and skills are crucial to the success of their business and career.
I am really looking forward to going back to Assen as I am very excited and motivated to race there again," said Sykes.
He is well suited to the the Assen GP track as it is a fast flowing circuit where he can let the Ducati have it's head.
Brookes arrives at Assen holding second place in the overall standings, 26 points adrift of series leader Shane Byrne.
After a run of misfortune mid-season following his debut NEC win at Silverstone Grand Prix Circuit back in May, Morris has worked double-hard with his Fortec Motorsport team behind the scenes to iron out some set-up issues and was back to his best at Assen with a memorable performance.
Burns, who rides the GS Racing Honda, sits in third place, 10 points clear of the outgoing champion Danny De Boer after a dramatic outing at Assen earlier this month.
Having been way off the pace at Silverstone last time out, Rossi was swapping fastest times with Marco Simoncelli in soaking conditions at Assen in yesterday's sole practice session (the afternoon running was cancelled).
At the beginning of the year Assen Yagodin was elected Chair of the Board of Directors of the Bulgarian Stock Exchange.
BAHRAIN'S leading Formula One prospect Hamad Al Fardan says that he is fully prepared for the free practice and qualifying sessions today to kick off the fifth round of the German Formula Three Championship at the TT Circuit Assen in the Netherlands.
The Marlboro Ducati rider suffered an indifferent start to the season but had come to the boil with victories in Donington Park and Assen in the past two races.