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Overview

plaque

Any small patch or region of abnormal tissue within the body. See amyloid plaque, gliosis. [From French plaquer to plate, from Middle Dutch placken to beat metal]

plaque

plaque n.   Quick reference

A Dictionary of Psychology (4 ed.)

Reference type:
Subject Reference
Current Version:
2015

... n . Any small patch or region of abnormal tissue within the body. See amyloid plaque , gliosis . [From French plaquer to plate, from Middle Dutch placken to beat...

plaque

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A Dictionary of Public Health (2 ed.)

Reference type:
Subject Reference
Current Version:
2018

...plaque A region of discontinuity, a patch or eruption; e.g., atheromatous plaques in large arteries, patches of accreted bacterial deposits on dental enamel. ...

plaque

plaque   Quick reference

World Encyclopedia

Reference type:
Subject Reference
Current Version:
2004
Subject:
Encyclopedias
Length:
39 words

... Abnormal deposit building up on a body surface, especially the film of saliva and bacteria that accumulates on teeth. Fatty and fibrous plaque can also form in blood vessels. Dental plaque leads to tooth decay and gum...

plaque

plaque   Quick reference

The Oxford Dictionary of Sports Science & Medicine (3 ed.)

Reference type:
Subject Reference
Current Version:
2007

... Strands of fibrous tissue that attach to the inside of blood vessels. Plaque formation contributes to the development of atherosclerosis , which may lead to a heart attack or a stroke. Its rate of development depends on heredity, diet, and other aspects of lifestyle; regular aerobic exercise may reduce plaque...

plaque

plaque   Quick reference

A Dictionary of Plant Sciences (4 ed.)

Reference type:
Subject Reference
Current Version:
2019
Subject:
Science and technology, Life Sciences
Length:
56 words

... In bacteriology, a round, clear area forming on an otherwise opaque culture plate of bacteria as a result of their lysis ( see lytic response ) by a bacteriophage (virulent virus) or other agent. Temperate phages produce turbid plaques because of the growth of lysogenized bacteria on the floor of the plaque...

plaque

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Oxford Dictionary of Word Origins (3 ed.)

Reference type:
Subject Reference
Current Version:
2021
Subject:
Language reference, History of English
Length:
53 words

...plaque [M19th] This word comes via French, from Dutch plak ‘tablet’, from plakken ‘to stick’. The notion of ‘sticking’ is often at the word’s core, whether referring to an ornamental plaque attached to a wall [M19th], dental plaque clinging to teeth [L19th], or in medicine a fatty deposit on an artery wall...

plaqué

plaqué   Reference library

The Oxford Companion to Music

Reference type:
Subject Reference
Current Version:
2011
Subject:
Music
Length:
21 words

...plaqué (Fr.). ‘Laid down’: an instruction that the notes of a chord should be played simultaneously rather than as an *arpeggio...

plaque

plaque   Quick reference

The Oxford Dictionary of Architecture (4 ed.)

Reference type:
Subject Reference
Current Version:
2021
Subject:
Art & Architecture
Length:
31 words

... Metal plate, stone slab , or any kind of tablet, usually inscribed, fixed to ( planted ) or inserted in a wall-surface, pavement, etc., as a memorial, ornament,...

plaque

plaque n.   Quick reference

Concise Medical Dictionary (10 ed.)

Reference type:
Subject Reference
Current Version:
2020
Subject:
Medicine and health, Clinical Medicine
Length:
120 words

... n. 1. a layer that forms on the surface of a tooth, principally at its neck, composed of bacteria in an organic matrix ( biofilm ). Under certain conditions the plaque may cause gingivitis , periodontal disease , or dental caries . The purpose of oral hygiene is to remove plaque. 2. a raised patch on the skin, formed by papules enlarging or coalescing to form an area 2 cm or more across. 3. a deposit, consisting of a fatty core covered with a fibrous cap, that develops on the inner wall of an artery in atherosclerosis ( see atheroma ). 4. any...

plaque

plaque   Quick reference

A Dictionary of Dentistry (2 ed.)

Reference type:
Subject Reference
Current Version:
2020
Subject:
Medicine and health, Dentistry
Length:
302 words
Illustration(s):
1

...plaque n. 1. A biofilm consisting of an organized bacterial community, salivary mucins and proteins adhering to tooth surfaces, restorations , and prosthetic appliances. Plaque forms by attachment of bacteria to the outer surface of the pellicle , predominantly in stagnation areas not having the benefit of the self-cleansing actions of the oral cavity . The bacterial composition of plaque is very dependent on the site location and local environment. If left undisturbed, initial colonization is predominantly by aerobic and facultative anaerobic...

plaque

plaque   Quick reference

A Dictionary of Genetics (8 ed.)

Reference type:
Subject Reference
Current Version:
2014
Subject:
Science and technology, Life Sciences
Length:
207 words
Illustration(s):
1

...The process continued until holes visible to the naked eye appeared. Different phages can sometimes be recognized by the morphology of the plaques they produce. The numerous small plaques in the figure are from T6 bacteriophage, while the four large plaques are from phage T7. Animal viruses will also attack monolayer cultures of animal cells on petri plates, so it is possible to assay virus titer in the same way by plaque counts. See Appendix C , 1939, Ellis and Delbrück; 1952,...

plaque

plaque   Quick reference

A Dictionary of Biology (8 ed.)

Reference type:
Subject Reference
Current Version:
2019
Subject:
Science and technology, Life Sciences
Length:
109 words

...plaque 1. A thin layer of organic material covering all or part of the exposed surface of a tooth. It contains dissolved food (mostly sugar) and bacteria. The bacteria in plaque metabolize the sugar and produce acid, which eats into the surface of the enamel of the tooth and eventually causes tooth decay ( dental caries ). 2. A clear area in a bacterial culture grown on an agar plate due to lysis of the bacteria by a bacteriophage. 3. A patch or differentiated zone on the surface of the skin or other organ. 4. A fatty deposit that causes thickening of an...

plaque

plaque n.   Quick reference

A Dictionary of Nursing (8 ed.)

Reference type:
Subject Reference
Current Version:
2021
Subject:
Medicine and health
Length:
81 words

... [plak] n. 1. a layer composed of bacteria in an organic matrix that forms on the surface of a tooth, principally at its neck. It may cause caries or periodontal disease. 2. a raised patch on the skin formed by enlarging or coalescing papules. 3. a deposit, consisting of a fatty core covered with a fibrous cap, that develops on the inner wall of an atheromatous artery. 4. any flattened patch or localized area of abnormality on a body...

plaque

plaque   Reference library

Oxford Dictionary of Biochemistry and Molecular Biology (2 ed.)

Reference type:
Subject Reference
Current Version:
2008
Subject:
Science and technology, Life Sciences
Length:
125 words

... 1 any small disk‐like object, patch, or zone. 2 a macroscopic or microscopic rounded clear zone in a layer of cells or bacterial lawn that results from the killing or lysis of adjacent cells by the action of a virus or other agent. a (a patch of) fibrous or lipid material on the inner surface of an artery. b an area of tissue degeneration with distinctive histological features characteristic of certain (especially neurological) diseases, e.g. kuru , multiple sclerosis . c a deposit of β‐amyloid, numbers of which are typically found in the brains of...

plaque

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A Dictionary of Food and Nutrition (4 ed.)

Reference type:
Subject Reference
Current Version:
2014

... Dental plaque is a layer of bacteria in an organic matrix on the surface of teeth, especially around the neck of each tooth. May lead to development of gingivitis, periodontal disease, and caries. Atherosclerotic plaque is the development of fatty streaks in the walls of blood vessels; see also atherosclerosis...

senile plaque

senile plaque n.   Quick reference

A Dictionary of Psychology (4 ed.)

Reference type:
Subject Reference
Current Version:
2015

...plaque n . Another name for an amyloid plaque...

plaque assay

plaque assay   Quick reference

A Dictionary of Biomedicine (2 ed.)

Reference type:
Subject Reference
Current Version:
2019

...plaque assay 1. An assay in which a dilute solution of a virus is applied to a culture of the host cells and the number of plaques (areas of dead or transformed cells) that develop indicates the number of infective viruses (plaque-forming units, pfu) in the solution. Secondary infection by convective spread is inhibited by making the medium viscous. 2. An assay for the number of cells producing antibody against erythrocytes or against antigen bound to the erythrocytes. A clear plaque of haemolysis surrounds cells that secrete antibody (plaque-forming...

neuritic plaque

neuritic plaque   Reference library

Oxford Dictionary of Biochemistry and Molecular Biology (2 ed.)

Reference type:
Subject Reference
Current Version:
2008
Subject:
Science and technology, Life Sciences
Length:
35 words

...plaque an extracellular mass of β‐amyloid filaments that is associated with dystrophic axons and dendrites, microglia, and astrocytes. In Alzheimer's disease such plaques occur in areas of the brain that serve cognition and...

plaque control

plaque control   Quick reference

A Dictionary of Dentistry (2 ed.)

Reference type:
Subject Reference
Current Version:
2020
Subject:
Medicine and health, Dentistry
Length:
84 words

...plaque control The methods by which bacterial dental plaque is either removed or its formation inhibited. Control may be by supragingival or subgingival delivery systems. Control of the supragingival environment has a beneficial effect on the subgingival. Plaque control may also be either mechanical or chemical. Delivery systems for plaque control agents Local Delivery Supragingival Subgingival Systemic Delivery Mouthrinse Irrigator Capsules/tablets Dentifrice Fibres Low-dose antimicrobials Gel Gel Irrigator Acrylic...

arterial plaque

arterial plaque   Quick reference

The Oxford Dictionary of Sports Science & Medicine (3 ed.)

Reference type:
Subject Reference
Current Version:
2007

...plaque Deposits of fatty substances (e.g. cholesterol) on arterial walls; it can lead to atherosclerosis...

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