atax - azoo
- ataxia
 - ataxia telangiectasia
 - ataxiaphasia
 - ataxic aphasia
 - ataxic breathing
 - ataxic dysarthria
 - ataxic speech
 - atelectasis
 - atelectatic rale
 - ateliosis
 - ateliotic dwarf
 - atelorrachidia
 - atenolol
 - ATG
 - athelia
 - atherectomy
 - atherectomy catheter
 - atheroembolic renal disease
 - atheroembolism
 - atherogenesis
 
- atheroma
 - atheromas
 - atheromata
 - atheromatosis
 - atheromatous plaque
 - atherosclerosis
 - atherosclerotic aneurysm
 - atherothrombosis
 - athetoid
 - athetosis
 - athiaminosis
 - athlete's foot
 - athlete's heart
 - athletic habitus
 - athletic heart syndrome
 - athletic trainer
 - athritis deformans
 - atlantal
 - atlantoaxial
 - atlantooccipital joint