| Jaffe-Lichtenstein disease | ostéofibrose |
| Japanese B Encephalitis | Encéphalite japonaise B |
| jet-lesion | jet-lésion |
| joint | articulation |
| joint capsule | capsule articulaire |
| joint mouse | souris articulaire |
| joint pain | douleur articulaire |
| joint space | interligne articulaire |
| joints | articulations |
| J-tip | en J |
| J-tip wire | fil-guide en J |
| karyolysis | caryolyse |
| karyon | noyau |
| karyorrhexis | caryorrhexie |
| karyosome | caryosome |
| keloid | chéloïde |
| ketolides | kétolides |
| kidney | rein |
| kidney disease | maladie des reins |
| kidney disease | néphropathie |
| kinetic | cinétique |
| kinetotherapy | kinésithérapie |
| kink | plicature |
| kissing spine | épines accolées |
| kissing ulcer | ulcère en miroir |
| kissing ulcer | ulcère de contact |
| kit | kit |
| knee brace | genouillère |
| knee joint | articulation du genou |
| knees | genoux |
| knock knee | genou en X |
| knock-knee | genou cagneux |
| knotted hair | trichorrhexie noueuse |
| kymography | kymographie |
| kyphosis | cyphose |