- AAT... to Ablepsy...
- Ablutomania... to Abruption...
- Abscess... to Acanthrocytosis...
- Acapnia... to Accreta...
- Accretio... to Acheiria...
- Achillobursitis... to Acidocytosis...
- Acidopenia... to Acragnosis...
- Acrania... to Acropachy...
- Acropachyderma... to Actinoneuritis...
- Action... to Additional...
- Adduction... to Adenopharyngitis...
- Adenophlegmon... to Adrenal...
- Adrenalism... to Affection...
- Afibrinogenemia... to Agranulocytopenia...
- Agranulocytosis... to Airplane...
- Akathisia... to Alcohol...
- Alcoholism... to Allergy...
- Allescheriosis... to Alveolus...
- Alymphocytosis... to Aminoaciduria...
- Amnesia... to Amyotrophia...
- Anacidity... to Andrews...
- Androblastoma... to Angioendothelioma...
- Angiofibroma... to Angiospastic...
- Angle... to Ankylostoma...
- Ankylostomiasis... to Antenatal...
- Antepartum... to Antritis...
- Antrum... to Aphthae...
- Apical... to Aqueous...
- Arabicum... to Arginosuccinicaciduria...
- Argonz... to Arteriolar...
- Arteriolith... to Arthrokatadysis...
- Arthrolithiasis... to Ascending...
- Aschoff... to Asteatosis...
- Astereognosis... to Ateleiosis...
- Atelia... to Atrichia...
- Atrioventricularis... to Autographism...
- Autophony... to Azygos...