• Occlusion (dentistry), the manner in which the upper and lower teeth come together when the mouth is closed
• Occlusion effect
  Occlusion effect
  The occlusion effect occurs when an object fills the outer portion of a person's ear canal, and that person perceives "hollow" or "booming" echo-like sounds of their own voice. It is caused by bone-conducted sound vibrations reverberating off the object filling the ear canal...
  
  , an audio phenomenon that occurs when one closes the opening into the ear canal and the loudness of low pitched sounds increases
• Occlusion miliaria
  Occlusion miliaria
  Occlusion miliaria is a skin condition that is accompanied by anhidrosis and increased heat-stress susceptibility, all after the application of extensive polyethylene film occlusion for 48 hours or longer....
  
  , a skin condition that is accompanied by anhidrosis and increased susceptibility to heat
• Occlusion culling or hidden surface determination
  Hidden surface determination
  In 3D computer graphics, hidden surface determination is the process used to determine which surfaces and parts of surfaces are not visible from a certain viewpoint...
  
  , a 3D computer graphics process
• Ambient occlusion
  Ambient occlusion
  Ambient occlusion is a shading method used in 3D computer graphics which helps add realism to local reflection models by taking into account attenuation of light due to occlusion...
  
  , a shading method used in 3D computer graphics
• Screen Space Ambient Occlusion
  Screen Space Ambient Occlusion
  Screen Space Ambient Occlusion is a rendering technique for efficiently approximating the well-known computer graphics ambient occlusion effect in real time...
  
   (SSAO), a computer graphics rendering technique
• Vascular occlusion
  Vascular occlusion
  Vascular occlusion is a sudden blockage of a blood vessel, usually with a clot. It differs from thrombosis in that it can be used to describe any form of blockage, not just one formed by a clot. When it occurs in a major vein, it can, in some cases, cause deep vein thrombosis. The condition is...
  
  , blockage of a blood vessel

See also

• Occlusive
• Occlusive dressing
  Occlusive dressing
  An occlusive dressing is an air- and water-tight trauma dressing used in first aid. These dressings are generally made with a waxy coating so as to provide a total seal, and as a result do not have the absorbent properties of gauze pads...
  
  
• Occultation
  Occultation
  An occultation is an event that occurs when one object is hidden by another object that passes between it and the observer. The word is used in astronomy . It can also refer to any situation wherein an object in the foreground blocks from view an object in the background...
  
  
• Occlusal trauma
  Occlusal trauma
  Occlusal trauma is a dental term that refers to the damage incurred when teeth are left in traumatic occlusion without proper treatment.When the maxillary and mandibular dental arches approach each together, as they do, for example, during chewing or at rest, the relationship between the opposing...
  
  
• Occluded front
  Occluded front
  An occluded front is formed during the process of cyclogenesis when a cold front overtakes a warm front. When this occurs, the warm air is separated from the cyclone center at the Earth's surface...