plaque

noun
\ ˈplak How to pronounce plaque (audio) \

Definition of plaque

1a : an ornamental brooch especially : the badge of an honorary order
b : a flat thin piece (as of metal) used for decoration
c : a commemorative or identifying inscribed tablet
2a : a localized abnormal patch on a body part or surface
b : a sticky usually colorless film on teeth that is formed by and harbors bacteria
c : an atherosclerotic lesion
d : a histopathologic lesion of brain tissue that is characteristic of Alzheimer's disease and consists of a dense proteinaceous core composed primarily of beta-amyloid that is often surrounded and infiltrated by a cluster of degenerating axons and dendrites
3 : a clear area in a bacterial culture produced by viral destruction of cells

Examples of plaque in a Sentence

A bronze plaque marked the city's oldest building. They gave him a plaque in honor of his 30 years of service. Brushing your teeth prevents the buildup of plaque. The scientists are studying the way the plaques form.
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Recent Examples on the Web

Charles and Camilla were there to unveil a plaque and officially reopen the castle, which has been under construction since 2014, to visitors. Caroline Hallemann, Town & Country, "Prince Charles and Camilla Are Spending Their Wedding Anniversary in Northern Ireland," 9 Apr. 2019 But as those plaques and tangles spread throughout the brain and cause more damage, people develop other symptoms, like difficulty swallowing, repetitive movements, wandering, and hallucinations. Sarah Jacoby, SELF, "How Exactly Do Different Kinds of Alzheimer’s Medications Work?," 6 Dec. 2018 Nearly one in every three American adults has high levels of LDL, the AHA says, which contributes to buildup of fatty plaque and narrowing of the arteries. Betsy Mckay, WSJ, "New Guidelines for Treating High Cholesterol Take a Personal Approach," 10 Nov. 2018 Indiana Elvis fans started a committee that raised money for the $10,000 plaque and base. Chicago Tribune, chicagotribune.com, "Plaque returning to final Elvis concert site in Indianapolis," 26 June 2018 Her niece, Nancy Janyszeski, was waiting in a reception line when something on the wall caught her eye: a plaque and a familiar name. Tommy Rowan, Philly.com, "Plaque honoring 'Men who served in World War II' includes two women," 24 May 2018 The royal village church, with its plaques and monuments, is like the private chapel of ailing megalomaniacs: the shrine of a clique. Moira Hodgson, WSJ, "‘The Quest for Queen Mary’ Review: Mum’s the Word," 10 Feb. 2019 Patricia glides past the benefactor wall (which listed her as a donor) and sits in a seat with her name inscribed on a plaque. Luzanne Otte, Town & Country, "A Day in the Life of Southern Charm's Patricia Altschul," 12 July 2018 Is a water flosser the best way to prevent grody plaque from building up between your teeth? Korin Miller, SELF, "What Is a Water Flosser and Should You Be Using One?," 26 Feb. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'plaque.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of plaque

1845, in the meaning defined at sense 1a

History and Etymology for plaque

French, from Middle French, metal sheet, from plaquer to plate, from Middle Dutch placken to piece, patch; akin to Middle Dutch placke piece, Middle High German placke patch

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Dictionary Entries near plaque

plan view

planxty

plappart

plaque

plaquette

plash

plashingly

Statistics for plaque

Last Updated

14 Apr 2019

Look-up Popularity

Time Traveler for plaque

The first known use of plaque was in 1845

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More Definitions for plaque

plaque

noun

English Language Learners Definition of plaque

: a flat, thin piece of metal or wood with writing on it that is used especially as a reminder of something (such as a historic event or an achievement)
: a thin coating that forms on teeth and contains bacteria
medical : a change in brain tissue that occurs in Alzheimer's disease

plaque

noun
\ ˈplak How to pronounce plaque (audio) \

Kids Definition of plaque

1 : a flat thin piece (as of metal) with writing on it that serves as a memorial of something
2 : a sticky usually colorless thin film on the teeth that is formed by and contains bacteria

plaque

noun
variants: also placque \ ˈplak How to pronounce placque (audio) \

Medical Definition of plaque

1a : a localized abnormal patch on a body part or surface and especially on the skin psoriatic plaque
b : a sticky usually colorless film on teeth that is formed by and harbors bacteria
c : an atherosclerotic lesion
d : a histopathologic lesion of brain tissue that is characteristic of Alzheimer's disease and consists of a dense proteinaceous core composed primarily of beta-amyloid that is often surrounded and infiltrated by a cluster of degenerating axons and dendrites

called also senile plaque

2 : a visibly distinct and especially a clear or opaque area in a bacterial culture produced by damage to or destruction of cells by a virus

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More from Merriam-Webster on plaque

Rhyming Dictionary: Words that rhyme with plaque

Spanish Central: Translation of plaque

Nglish: Translation of plaque for Spanish Speakers

Britannica English: Translation of plaque for Arabic Speakers

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