AO

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AO

Abbreviation for:
abdominal obesity
Accountable Officer (Medspeak-UK) 
accreditation organisation
acid output
acridine orange
adult onset
adverse outcome
age of onset
airways obstruction
aldehyde oxidase
alveolar osteitis
anaplastic oligodendroglioma
angle of
ankle orthosis
anterior oblique
antioxidant
antisense oligonucleotide
aorta
aortic occlusion
aortic opening
arterial occlusion
atlanto-occipital
atlanto-odontoid
atypical odontalgia