Meaning of “plaque” in the English Dictionary

"plaque" in American English

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us /plæk/

plaque noun (record)

[ C ] a flat object, often of stone or metal, with text that records information about a person, place, or event:

The plaque on the building pays tribute to the founder's generosity.

plaque noun (substance)

[ C/U ] a substance that grows on your teeth if you do not brush them regularly

[ C/U ] Plaque is also a substance that may grow inside the body with certain diseases:

About 20 companies are working on treatments for Alzheimer's that would interfere with plaque formation.

(Definition of “plaque” from the Cambridge Academic Content Dictionary © Cambridge University Press)