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Plaque or placque may refer to:

In biology[edit]

  • Amyloid plaque
  • Atheroma or atheromatous plaque, a buildup of deposits within the wall of an artery
  • Dental plaque, a biofilm that builds up on teeth
  • A broad papule, a type of cutaneous condition
  • Pleural plaque, associated with mesothelioma, a cancer often caused by exposure to asbestos
  • Senile plaques, an extracellular protein deposit in the brain implicated in Alzheimer's disease
  • Viral plaque, a visible structure formed by virus propagation within a cell culture

See also[edit]