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 The plaque notes his final resting place in the columbarium near the Chapel of St. Joseph of Arimathea. Maddie Capron And Justin Lear, CNN, "A plaque dedicated to Matthew Shepard installed at Washington National Cathedral," 4 Dec. 2019 The Pioneer plaque gives a hint in the form of a basic diagram of a hydrogen atom, the magnetic polarity of which flips at regular intervals, with a frequency of 1,420MHz. The Economist, "How to talk to aliens," 28 Nov. 2019 In addition to the plaque, Shea said the park still needs some touch up work, including seeding in some areas and sand infill between the brick pavers. Emily Brindley, courant.com, "Simsbury’s flower bridge reopens, new park debuts after months of construction," 27 Nov. 2019 Around the Cercos household, the plaques go up on the wall and don’t get talked about much. Steve Rubenstein, SFChronicle.com, "For these San Francisco firefighters, bravery runs in the family," 20 Nov. 2019 The plaque was removed and refurbished and is being featured in a more visible area. USA TODAY, "El Paso memorial, hogs by helicopter, trees for troops: News from around our 50 states," 14 Nov. 2019 So be sure to use keratolytic moisturizers as directed and only on the thickest plaques rather than across large swaths of skin. 4. Sara Coughlin, SELF, "9 Tips for Managing a Psoriasis Flare-Up That Dermatologists Swear By," 5 Nov. 2019 Most Alzheimer’s drug development has focused on attacking the beta-amyloid plaques that form in the brains of Alzheimer’s disease patients, which are thought to interfere with neural signaling. Kelly Servick, Science | AAAS, "Alzheimer’s experts greet China’s surprise approval of a drug for brain disease with hope and caution," 5 Nov. 2019 The News Journal of Wilmington reports the plaque dedicated to laborer George White was unveiled Sunday, replacing one stolen over the summer. San Diego Union-Tribune, "Replacement unveiled for Delaware’s stolen lynching memorial," 21 Oct. 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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Time Traveler for plaque

Time Traveler

The first known use of plaque was in 1845

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Statistics for plaque

Last Updated

8 Dec 2019

Cite this Entry

“Plaque.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/plaque. Accessed 14 December 2019.

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More Definitions for plaque

plaque

noun
How to pronounce plaque (audio)

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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