also  placque  n 1 a  :  a localized abnormal patch on a body part or surface and esp. on the skin <psoriatic >   b  :  a film of mucus that harbors bacteria on a tooth  c  :  an atherosclerotic lesion  d  :  a histopathologic lesion of brain tissue that is characteristic of Alzheimer's disease and consists of a cluster of degenerating nerve endings and dendrites around a core of amyloid - called also senile plaque   2  :  a visibly distinct and esp. a clear or opaque area in a bacterial culture produced by damage to or destruction of cells by a virus .
 
 
 
Similar sounding terms:  HPLC  plague  pli·ca   plug 
 
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