Look up plaque in Wiktionary, the free dictionary.

Plaque or placque may refer to:

(Not to be confused with plague)

• Commemorative plaque, a flat ornamental plate or tablet fixed to a wall, used to mark a significant event, person, etc.
• Memorial Plaque, issued to next-of-kin of dead British military personnel after World War I
• Plaque, a rectangular Casino token
• Plaque, a thin layer of one metal, such as gold or silver, onto the surface of another

In biology:

• Dental plaque, a biofilm that builds up on teeth
• Atheromatous plaque, a buildup of white blood cell (sometimes termed fatty, despite absence of adipocytes) deposits within the wall of an artery
• Mucoid plaque, a supposed thick coating of abnormal mucous material in the colon
• Viral plaque, a visible structure formed by virus propagation within a cell culture
• Senile plaques, an extracellular protein buildup implicated in various diseases like Alzheimer's disease or Parkinson's disease
• Plaque (dermatology) as in broad papule
• Pleural plaque, pleural fibrosis, often caused by exposure to asbestos

• Placard, a poster
• Plack, an ancient Sco coin

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