An ornamental tablet, typically of metal, porcelain, or wood, that is fixed to a wall or other surface in commemoration of a person or event
a plaque in her honor was placed on the door to the auditorium
(In the UK) a round blue sign attached to the facade of a building to commemorate its historical significance, typically giving the name of a famous or eminent person who once lived in or near the building
A microscopic mass of fragmented and decaying nerve terminals around an amyloid core, numbers of which occur in the brains of people with Alzheimer’s disease
An argyrophilic area of degenerated neuronal processes surrounding a core of amyloid, seen in large numbers in Alzheimer's and certain other diseases; also called senile plaque.