- apellous
- apenteric
- apepsia
- apepsy
- aperient
- aperitive
- apex cordis
- apex masi
- apex murmur
- apex pulmonis
- Apgarseore
- aphagia
- aphakia
- aphasia
- aphasiac
- aphasic
- aphemesthesia
- aphonia
- aphonic pectoriloquy
- aphony
- aphose
- aphotic
- aphrenia
- aphrodisiac
- aphtha
- aphthae
- apical
- apical abscess
- apical area
- apical bronchus
- apical fiber
- apical infection
- apicalabscess
- apicectomy
- apicoectomy
- apicolysis
- apiphobia
- apisination
- apituitarism
- aplacental
- aplanatic lens
- aplanitic focus
- aplasia
- aplasmic
- aplastic anemia
- aplastic crisis
- apnea
- apnea neonatorum
- apnoea
- apocarteresis
- apochromat
- apocrine
- apoenzyma
- apoferritin
- apogee
- apolegamic
- apolepsis
- apomorphine
- aponeuractomy
- aponeurose
- aponeurosis
- apopathetic
- apophlegmatic
- apophylaxis
- apophysis
- apoplectic
- apoplexy
- aporinosis
- aposia
- apostema
- apothecary
- apotoxin
- apparatus
- appendectomy
- appendiceal abscess
- appendicectomy
- appendices
- appendicitis
- appendicitis obliterans
- appendicolithiasis
- appendicopathy
- appendicostomy
- appendicular
- appendicular vein
- appendix
- appendix testis
- apperception
- appetition
- applied anatomy
- applied science
- apposition suture
- approach
- apraxia
- apsychia
- apthous ulitis
- aptyalism
- apyknomorphous
- apyrexia
- aquatic
- aquocapsulitis