plaque

play
noun \ˈplak\

Definition of plaque

  1. 1a :  an ornamental brooch; especially :  the badge of an honorary orderb :  a flat thin piece (as of metal) used for decorationc :  a commemorative or identifying inscribed tablet

  2. 2a :  a localized abnormal patch on a body part or surfaceb :  a sticky usually colorless film on teeth that is formed by and harbors bacteriac :  an atherosclerotic lesiond :  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. 3 :  a clear area in a bacterial culture produced by viral destruction of cells

Examples of plaque in a sentence

  1. A bronze plaque marked the city's oldest building.

  2. They gave him a plaque in honor of his 30 years of service.

  3. Brushing your teeth prevents the buildup of plaque.

  4. The scientists are studying the way the plaques form.

Origin and Etymology of 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


First Known Use: 1845

Other Dentistry Terms


PLAQUE Defined for English Language Learners

plaque

play
noun \ˈplak\

Definition of plaque for English Language Learners

  • : 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 Defined for Kids

plaque

play
noun \ˈplak\

Definition of plaque for Students

  1. 1 :  a flat thin piece (as of metal) with writing on it that serves as a memorial of something

  2. 2 :  a sticky usually colorless thin film on the teeth that is formed by and contains bacteria


Medical Dictionary

plaque

noun
variants: also

placque

\ˈplak\play

Medical Definition of plaque

  1. 1a:  a localized abnormal patch on a body part or surface and especially on the skin psoriatic plaqueb:  a sticky usually colorless film on teeth that is formed by and harbors bacteriac:  an atherosclerotic lesiond:  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. 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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