A flat, typically rectangular, piece of metal, wood, or other material, often inscribed, used as a memorial or to commemorate an event or achievement.

The university awarded her a plaque in recognition of her outstanding contributions to research.

A sticky deposit on teeth in which bacteria proliferate, often leading to dental issues such as cavities or gum disease.

Regular brushing and flossing help prevent the buildup of plaque on teeth.

A patch of abnormal tissue, often found in the body, such as in arteries or on the skin, which can be indicative of disease.

The doctor explained that the plaque in his arteries was causing the reduced blood flow.

In microbiology, a clear, round area on a lawn of bacteria or cell culture where cells have been lysed by a virus.

The scientist counted the viral plaques to determine the phage concentration.

plaqueadjective

Relating to or intended to remove, prevent, or otherwise deal with dental plaque, or pertaining to plaques when used attributively.

She bought a plaque removal mouthwash.