Plaque or placque may refer to:

  • Commemorative plaque, a flat ornamental plate or tablet fixed to a wall, used to mark a significant event, person, etc.
  • Plaquette, a small decorative plaque in metal, ceramics, or other materials
  • Memorial Plaque, issued to next-of-kin of dead British military personnel after World War I
  • Plaque, a rectangular casino token

Read more about Plaque:  In Biology