1. A kind of encysted tumor; also called, an atherosclerotic plaque, arterial plaque or, simply, a plaque.
2. A fatty deposit in the intima (inner lining) of an artery which can obstruct blood flow.
3. A deposit or degenerative accumulation of lipid-containing plaques on the innermost layer of the wall of an artery.
4. Etymology: Greek > Latin, a tumor full of gruel-like matter.