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单词 fluoride
释义

Definition of fluoride in English:

fluoride

noun ˈflʊərʌɪdˈflɔːrʌɪd
  • 1Chemistry
    A compound of fluorine with another element or group, especially salt of the anion F⁻ or an organic compound with fluorine bonded to an alkyl group.

    Example sentencesExamples
    • What Sanpaolesi had aimed to do was to consolidate the deteriorated surface of the marble by forming a layer of calcium, zinc and magnesium fluorides and silica gel on the marble surface.
    • Fluxes containing fluorides, chlorides, silica, and borax provide both covering and cleaning, along with the ability to dissolve and collect these objectionable oxide skins.
    • Highly substituted alkyl fluorides, perfluoroalkanes, are now used as artificial blood substitutes because of their oxygen transporting properties.
    • Many elements form fluorides, however, that cannot be labeled covalent or ionic; these halides exhibit the characteristics of polymeric compounds.
    • Aluminum is derived in a process that produces air pollutants (e.g., particulates and gaseous fluorides, sulfur dioxide, particulate matter).
  • 2mass noun Sodium fluoride or another fluorine-containing salt added to water supplies or toothpaste in order to reduce tooth decay.

    Example sentencesExamples
    • Lancaster City Council heard that water companies could be forced to add fluoride to drinking supplies under moves to prevent tooth decay.
    • There is overwhelming evidence that fluoride can substantially reduce tooth decay.
    • Some weeks ago we learned that a vote in Parliament had found two of our members in favour of adding fluoride to our water supply and one against.
    • The undersigned strongly support the introduction fluoride into the water supply at the earliest possible opportunity.
    • AN MP claims the government's backing for putting fluoride in water supplies could be a recipe for murder - with a cup of tea.
    • Both dentists and scientists agree adding fluoride to the water supply is a safe, effective way to help protect teeth, especially young teeth.
    • Authority members backed the plan but after months of talks Yorkshire Water decided against adding fluoride to supplies.
    • A study of 25 popular brands of bottled water found that they were unlikely to contain enough fluoride to protect children's teeth.
    • Children with fissure sealants still need to brush their teeth with fluoride toothpaste.
    • Like all the other dentists, Lester had learnt in dental school that fluoride reduces tooth decay.
    • Use fluoride toothpaste as fluoride makes teeth stronger and more resistant to acid attacks.
    • The only way to discover whether people wanted fluoride in their water supplies was to hold mini referendums on the issue, he claimed.
    • Humberside Area Health Authority was to investigate the possibility of introducing fluoride into all water supplies in the county.
    • The company is capable of adding fluoride to water supplies, but does not want to have to make the decision whether to or not.
    • However, in the mid-1990s, it began to question the wisdom of putting fluoride in the water supply.
    • A ‘yes’ vote would allow health authorities to make water companies add fluoride to supplies in areas where it is supported.
    • Peers voted in favour of smoothing the way for water companies to put fluoride in their supplies when the Bill was debated in the Lords during the summer.
    • You may have heard that the addition of fluoride to the water supply is dangerous and damaging.
    • The Minister for Health is dosing our tap water with chemical fluoride to supposedly give us better teeth.
    • Request local water company to supply water with optimum fluoride level.

Origin

Early 19th century: from fluorine + -ide.

 
 

Definition of fluoride in US English:

fluoride

noun
Chemistry
  • 1A compound of fluorine with another element or group, especially a salt of the anion F⁻ or an organic compound with fluorine bonded to an alkyl group.

    Example sentencesExamples
    • Highly substituted alkyl fluorides, perfluoroalkanes, are now used as artificial blood substitutes because of their oxygen transporting properties.
    • Fluxes containing fluorides, chlorides, silica, and borax provide both covering and cleaning, along with the ability to dissolve and collect these objectionable oxide skins.
    • Many elements form fluorides, however, that cannot be labeled covalent or ionic; these halides exhibit the characteristics of polymeric compounds.
    • What Sanpaolesi had aimed to do was to consolidate the deteriorated surface of the marble by forming a layer of calcium, zinc and magnesium fluorides and silica gel on the marble surface.
    • Aluminum is derived in a process that produces air pollutants (e.g., particulates and gaseous fluorides, sulfur dioxide, particulate matter).
    1. 1.1 Sodium fluoride or another fluorine-containing salt added to water supplies or toothpaste in order to reduce tooth decay.
      Example sentencesExamples
      • Some weeks ago we learned that a vote in Parliament had found two of our members in favour of adding fluoride to our water supply and one against.
      • AN MP claims the government's backing for putting fluoride in water supplies could be a recipe for murder - with a cup of tea.
      • Humberside Area Health Authority was to investigate the possibility of introducing fluoride into all water supplies in the county.
      • Request local water company to supply water with optimum fluoride level.
      • The undersigned strongly support the introduction fluoride into the water supply at the earliest possible opportunity.
      • A study of 25 popular brands of bottled water found that they were unlikely to contain enough fluoride to protect children's teeth.
      • Peers voted in favour of smoothing the way for water companies to put fluoride in their supplies when the Bill was debated in the Lords during the summer.
      • There is overwhelming evidence that fluoride can substantially reduce tooth decay.
      • You may have heard that the addition of fluoride to the water supply is dangerous and damaging.
      • Lancaster City Council heard that water companies could be forced to add fluoride to drinking supplies under moves to prevent tooth decay.
      • The company is capable of adding fluoride to water supplies, but does not want to have to make the decision whether to or not.
      • Both dentists and scientists agree adding fluoride to the water supply is a safe, effective way to help protect teeth, especially young teeth.
      • The Minister for Health is dosing our tap water with chemical fluoride to supposedly give us better teeth.
      • Use fluoride toothpaste as fluoride makes teeth stronger and more resistant to acid attacks.
      • Authority members backed the plan but after months of talks Yorkshire Water decided against adding fluoride to supplies.
      • However, in the mid-1990s, it began to question the wisdom of putting fluoride in the water supply.
      • A ‘yes’ vote would allow health authorities to make water companies add fluoride to supplies in areas where it is supported.
      • The only way to discover whether people wanted fluoride in their water supplies was to hold mini referendums on the issue, he claimed.
      • Children with fissure sealants still need to brush their teeth with fluoride toothpaste.
      • Like all the other dentists, Lester had learnt in dental school that fluoride reduces tooth decay.

Origin

Early 19th century: from fluorine + -ide.

 
 
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更新时间:2024/12/23 1:10:21