Plaque

The word plaque can have different connotations and can also be spelt placque:

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• Dental plaque is a yellowish biofilm that builds up on the teeth. If not removed regularly, it can lead to dental cavities (caries).
• In atherosclerosis, atheromatous plaque is a buildup of fatty deposits within the wall of an artery that narrows the artery, contributing to stroke and myocardial infarction.
• A commemorative plaque can be a flat ornamental plate or tablet fixed to a wall, often used to mark a significant event, person, etc.
• A viral plaque is a visible structure formed by virus propagation within a cell culture.
• Plaque can additionally be used to refer to a (usually) small, disk-shaped growth on the human body, common in some forms of skin cancer.