- a
- A bands
- a cappella
- A chain
- A disks
- a fetoprotein
- A fibres
- a granules
- a haemolysin
- a helix
- A layer
- a posteriori
- a priori
- a thalassaemia intermedia
- A wave
- a' haemolysis
- A-DNA
- A-E amputation
- A-esotropia
- A-exotropia
- a-factor
- a-form DNA
- a-good
- A-H conduction time
- A-H interval
- A-K amputation
- A-mode
- a-mornings
- A-N interval
- A-P-C virus
- A-pattern strabismus
- a-protein
- A-strabismus
- A-V
- A-V anastomosis
- A-V band
- A-V block
- A-V bundle
- A-V canal
- A-V conduction
- A-V conduction abnormalities
- A-V difference
- A-V dissociation
- A-V extrasystole
- A-V fistula
- A-V interval
- A-V junction
- A-V junctional rhythm
- A-V junctional tachycardia
- A-V malformation
- A-V node
- A-V shunt
- A-V strabismus syndrome
- A-V valves
- A/G ratio
- a1-acid glycoprotein
- a1-antitrypsin
- a1-lipoprotein
- a1-trypsin inhibitor
- a1PI
- A2 thalassaemia
- a2-neuraminoglycoprotein
- AA
- aaa disease
- Aad
- AAF
- AAMC
- AAR
- aardvark
- aardwolf
- Aaron's rod
- Aaron's sign
- Aaron, Charles
- Aarskog syndrome
- Aarskog, Dagfinn
- Aarskog-Scott syndrome
- AASH
- AAV
- Ab
- ab er-de-vine
- ab-
- AB-C protease
- abaca
- abacterial thrombotic endocarditis
- abactinal
- abacus
- abada
- Abadie
- Abadie's sign of tabes dorsalis
- abalone
- abampere
- abandon
- abandoned
- abanga
- abapical
- abapical pole
- abarognosis
- abarticulation
- abasia
- abasia trepidans
- abasia-astasia
- abasic
- abattis
- abattoirs
- abaxial
- abaxile
- abba
- Abbe apertometre
- Abbe flap
- Abbe limit
- Abbe operation
- Abbe substage apparatus
- Abbe test plate
- Abbe theory of image formation
- Abbe's condenser
- Abbe's law of limiting resolution
- Abbe, Ernst
- Abbe, Ernst K
- Abbe, Robert
- abbokinase
- Abbott's artery
- Abbott's method
- Abbott's stain
- Abbott's tube
- Abbott, Alexander
- Abbott, Edville
- Abbott, W. Osler
- abbreviate
- abbreviated injury scale
- abbreviations
- ABC leads
- ABC process
- abc transporters
- abcoulomb
- abdomen
- abdomen obstipum
- abdomen, acute
- abdominal
- abdominal abscess
- abdominal adhesions
- abdominal angina
- abdominal aorta
- abdominal aortic aneurysm
- abdominal aortic coarctation
- abdominal aortic plexus
- abdominal apoplexy
- abdominal ballottement
- abdominal canal
- abdominal cavity
- abdominal delivery
- abdominal dropsy
- abdominal external oblique muscle
- abdominal fibromatosis
- abdominal fissure
- abdominal fistula
- abdominal guarding
- abdominal hernia
- abdominal hysterectomy
- abdominal hysterotomy
- abdominal injuries
- abdominal internal oblique muscle
- abdominal lipectomy
- abdominal migraine
- abdominal muscle deficiency syndrome
- abdominal muscles
- abdominal myomectomy
- abdominal nephrectomy
- abdominal ostium of uterine tube
- abdominal pad
- abdominal pain
- abdominal panniculectomy
- abdominal part of aorta
- abdominal part of oesophagus
- abdominal part of thoracic duct
- abdominal part of ureter
- abdominal pool
- abdominal pregnancy
- abdominal pressure
- abdominal pulse
- abdominal reflexes
- abdominal regions
- abdominal respiration
- abdominal ring
- abdominal sac
- abdominal salpingectomy
- abdominal salpingo-oophorectomy
- abdominal section
- abdominal typhoid
- abdominal wall fat pad biopsy
- abdominal zones
- abdominales
- abdominalia
- abdomino-
- abdominocardiac reflex
- abdominocentesis
- abdominocyesis
- abdominocystic
- abdominogenital
- abdominohysterectomy
- abdominohysterotomy