odor - ORM
- open dislocation
- open drainage
- Open fracture
- open heart surgery
- open hydronephrosis
- open joint
- open loop
- open loop reflex
- open mitosis
- open operation
- open pneumothorax
- open pubic arch
- open pulpitis
- Open reading frame
- open reduction
- open rhinolalia
- open spring
- open trial
- open tuberculosis
- Open wound
- open-angle glaucoma
- open-bite malocclusion
- open-cavity mastoidectomy
- open-cavity tympanomastoidectomy
- open-chain compound
- open-closed circulation theory
- open-face crown
- open-heart
- open-label
- open-mouth projection
- opening
- opening axis
- opening in adductor magnus muscle
- opening movement
- opening of cochlear canaliculus
- opening of coronary artery
- opening of coronary sinus
- opening of frontal sinus
- opening of ileocecal valve
- opening of inferior vena cava
