#plaque  a small abnormal patch on or inside the body
  supertype:  #speckle__spot__dapple__patch__fleck__maculation  a small contrasting part of something; "a bald spot"; "a leopard's spots"; "a patch of clouds"; "patches of thin ice": "a fleck of red"
  subtype:  #amyloid_plaque__amyloidplaque__amyloid_protein_plaque__amyloidproteinplaque  a plaque consisting of tangles of amyloid protein in nervous tissue (a pathological mark of Alzheimer's disease)
  subtype:  #dental_plaque__bacterial_plaque__bacterialplaque  a deposit on the teeth that encourages the development of dental caries

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