plaque(redirected from annular plaque)
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1. Pathol any small abnormal patch on or within the body, such as the typical lesion of psoriasis
2. short for dental plaque
A patch, or an abnormal flat area on any internal or external body surface.
A localized area of atherosclerosis.
A clear area representing a colony of viruses on a plate culture formed by lysis of the host cell.
A tablet that is affixed to the surface of a wall or set into a wall; often inscribed to commemorate a special event or to serve as a memorial.