Jacquemier's sign - koilonychia
- Janoљнk embryo
- Janoљнk embryo
- Jansen
- Jansen disease
- Jansen disease
- JanskÑ-Bielschowsky disease
- JanskÑ-Bielschowsky disease
- Jansky
- Janthinosoma
- Janumet
- Janus green
- Janus green B
- Janus kinase
- Januvia
- Janz syndrome
- Japanese B encephalitis
- Japanese encephalitis
- Japanese encephalitis virus
- Japanese encephalitis virus vaccine
- Japanese farcy
- Japanese flood fever
- Japanese glanders
- Japanese spotted fever
- Japanese star anise
- japonica
- JAPV
- Jaquet apparatus
- Jaquet apparatus
- jar
- jararaca
- Jarcho pressometer
- Jarcho pressometer
- Jarcho-Levin syndrome
- Jarcho-Levin syndrome
- jargon
- jargon agraphia
- jargon aphasia
- jargonaphasia
- Jarisch
- Jarisch-Herxheimer reaction
