- Sticky white stuff on your teeth with bacteria in it is an example of plaque.
- A little brass plate with the name of a donor on it that is attached to a bench the donor paid for is an example of a plaque.
- any thin, flat piece of metal, wood, etc., with a picture, design in relief, etc., hung as on a wall for ornamentation
- a wall tablet inscribed to commemorate an event, identify a building, etc.
- a platelike brooch worn as a badge or ornament
- an abnormal patch on the skin, mucous membrane, etc.
- a thin, transparent film on a tooth surface, containing mucin, bacteria, etc.: if not removed it forms tartar and promotes tooth decay
- a deposit of fatty or fibrous material in a blood vessel wall
Origin of plaqueFrench ; from Middle Dutch placke, disk, spot, patch
- A flat plate, slab, or disk that is ornamented or engraved for mounting, as on a wall for decoration or on a monument for information.
- A small pin or brooch worn as an ornament or a badge of membership.
- Medicine a. A deposit of fatty material on the inner lining of an arterial wall, characteristic of atherosclerosis.b. A scaly patch on a body part, especially the skin.c. A film of mucus and bacteria on a tooth surface.d. A lesion found in the brain tissue of people with Alzheimer's disease, consisting mainly of beta-amyloid protein and degenerating nerve tissue.e. A sharply defined zone of demyelination in the brain characteristic of multiple sclerosis.
- A clear, often round patch of lysed cells in an otherwise opaque layer of a bacteria or cell culture.
Origin of plaqueFrench, from Old French, metal plate, perhaps from Middle Dutch placke, disk, patch.
(countable and uncountable, plural plaques)
- Any flat, thin piece of metal, clay, ivory, or the like, used for ornament, or for painting pictures upon, as a slab, plate, dish, or the like, hung upon a wall; also, a smaller decoration worn on the person, as a brooch.
- A piece of flat metal with a writing on it, atached to a building to remind people of a person ar an event
- (uncountable) An accumulation of biofilm, or bacteria on teeth.
- (uncountable, medicine) Atheroma, an accumulation in artery walls made up of macrophage cells and debris containing lipids, (cholesterol and fatty acids), calcium, and connective tissue.
- (biology) A clearing in a bacterial lawn caused by a virus.
Borrowing from French plaque, derivative of plaquer (“to plate"), from Middle Dutch placken (“to patch, beat metal into a thin plate"), from placke (“disk, patch, stain"), from Old Dutch *plagga (“patch"), from Proto-Germanic *plaggÄ… (“patch"). Cognate with Middle Low German placke, plagge (“small stain, scraps, rags, thin grass"), German Placken (“spot, patch"), Eastern Frisian plak, plakke (“a blow, slap"), Swedish plagg (“clothing, garment"). See plack.