Plaque
/plˈæk/
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Definition
(noun) Any flat, thin piece of clay, ivory, metal, etc., used for ornament, or for painting pictures upon, as a dish, plate, slab, etc., hung upon a wall; also, a smaller decoration worn by a person, such as a brooch.
Sentence Examples
I think I have a lot of plaque build up.
The plaque has to be removed.
CEFR Practice Quiz
The dentist advised brushing twice a day to remove ____ and prevent tooth decay.