Plaque definition

plăk
Frequency:
A deposit of material in a bodily tissue or organ, especially one of the fatty deposits that collect on the inner lining of an artery wall in atherosclerosis or one of the amyloid deposits that accumulate in the brain in Alzheimer's disease.
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A film of mucus and bacteria on the surface of the teeth.
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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.
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A small pin or brooch worn as an ornament or a badge of membership.
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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.
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A piece of flat metal with a writing on it, atached to a building to remind people of a person ar an event.
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(uncountable) An accumulation of biofilm, or bacteria on teeth.
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(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.
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(biology) A clearing in a bacterial lawn caused by a virus.
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Plaque is sticky white stuff on your teeth in which bacteria live, a wood or metal object that is often used to commemorate or memorialize.

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.

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A clear, often round patch of lysed cells in an otherwise opaque layer of a bacteria or cell culture.
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A deposit of fatty material on the inner lining of an arterial wall, characteristic of atherosclerosis.
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A scaly patch on a body part, especially the skin.
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A film of mucus and bacteria on a tooth surface.
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A lesion found in the brain tissue of people with Alzheimer's disease, consisting mainly of beta-amyloid protein and degenerating nerve tissue.
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A sharply defined zone of demyelination in the brain characteristic of multiple sclerosis.
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A platelike brooch worn as a badge or ornament.
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Any thin, flat piece of metal, wood, etc., with a picture, design in relief, etc., hung as on a wall for ornamentation.
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A wall tablet inscribed to commemorate an event, identify a building, etc.
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An abnormal patch on the skin, mucous membrane, etc.
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A thin, transparent film on a tooth surface, containing mucin, bacteria, etc.: if not removed it forms tartar and promotes tooth decay.
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A deposit of fatty or fibrous material in a blood vessel wall.
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A scaly patch on a body part, especially the skin.
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A biofilm of bacteria in a matrix of polysaccharides and other substances on the surface of a tooth or teeth.
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A deposit consisting mainly of beta-amyloid and degenerating nerve tissue, found in the brain tissue of people with Alzheimer's disease.
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A sharply defined zone of demyelination in the central nervous system characteristic of multiple sclerosis.
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A clear, often round patch of lysed cells in an otherwise opaque layer of a bacteria or cell culture.
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A deposit of fatty material on the inner lining of an arterial wall, characteristic of atherosclerosis.
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The material that such a deposit is composed of.
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A small disk-shaped formation or growth; a patch.
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Other Word Forms

Noun

Singular:
plaque
Plural:
plaques

Origin of plaque

  • French from Old French metal plate perhaps from Middle Dutch placke disk, patch

    From American Heritage Dictionary of the English Language, 5th Edition

  • 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.

    From Wiktionary