Definition of fluorescence in US English:

fluorescence

noun

  • 1The visible or invisible radiation emitted by certain substances as a result of incident radiation of a shorter wavelength such as X-rays or ultraviolet light.

    • ‘The fluorescence is not visible because the background was subtracted in each spectrum.’
    • ‘This fluorescence is visible even when the paper screen is at a distance of two metres from the apparatus.’
    • ‘The reflected fluorescence was detected via photomultipliers.’
    • ‘This is consistent with the weak dityrosine fluorescence observed under UV light.’
    • ‘As pollen grains and pollen tubes emitted very strong fluorescence, the pathways of growing pollen tubes could be easily observed.’
    • ‘This is because fluorescence at this wavelength is strongly absorbed by chlorophyll within the overlying cells.’
    • ‘The cellular genes are treated with fluorescence and literally light up the gene dots on the chip.’
    • ‘When illuminated with violet light, the tumour emits pink fluorescence that is detected by a highly sensitive camera.’
    • ‘The uralolite exhibits faint green fluorescence in shortwave ultraviolet radiation.’
    • ‘When a beam strikes the card, the material produces fluorescence in the visible spectrum.’
    • ‘A laboratory technician checked urine for ultraviolet fluorescence indicating the presence of riboflavin.’
    • ‘By mixing different dyes, the colour of the fluorescence can be selected and hence a screen can be built up from loops of the fibres.’
    • ‘My pupils contracted painfully from the relentless fluorescence of the lights above.’
    • ‘The emitted fluorescence light from the sample surface was collected through a quartz flow cell.’
    • ‘The fluorescence intensity emitted by the chloroplasts is dependent on the amount of light absorbed by them.’
    • ‘Any fluorescence under ultraviolet light may also provide clues to the identity and status of a gemstone.’
    • ‘The excited donor will emit fluorescence, leading to a decrease of efficiency.’
    • ‘The greenish fluorescence seen under the light is due to an ectothrix infection of hairs, in which fungal spores form a sheath on the outside of the hair.’
    • ‘Protoplasts showing bright fluorescence were counted as viable.’
    • ‘Our own observations showed that fluorescence was visible throughout the cytoplasm.’
    light, brightness, gleam, glow, glint, glimmer, sparkle, twinkle, flicker, glitter, glisten, shimmer, flash, dazzle, beam, flare, glare, radiance, illumination, luminescence, luminosity, incandescence, phosphorescence
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    1. 1.1 The property of absorbing light of short wavelength and emitting light of longer wavelength.
      • ‘Steady-state fluorescence parameters were measured at each light level.’
      • ‘The abbreviations for chlorophyll fluorescence parameters and their derivation are as described previously.’
      • ‘It should be noted that ultraviolet fluorescence is not unknown in gibbsite.’
      • ‘Greater sensitivity can be achieved using laser activated fluorescence detectors.’
      • ‘One of the main attractions of chlorophyll fluorescence is that it appears to give a measure of photosynthesis.’
      • ‘It seemed that the uranium compounds emitted yet another kind of radiation, not X-rays and not related to fluorescence.’
      • ‘At steady state, cells were centrifuged and the fluorescence of the supernatant measured.’
      • ‘No particularly strong fluorescence of calcite, especially by comparison with glass, has been noticed.’
      • ‘At each step of the dynamics, the instantaneous fluorescence lifetime was computed.’
      • ‘There are many familiar examples of fluorescence and phosphorescence in our daily lives.’
      • ‘Other mutants displayed green fluorescence or lacked fluorescent properties.’
      • ‘Second, it was established that cyan and green emitters can be modified so as to produce an intermediate spectrum of fluorescence.’
      • ‘To do so, it is common to gain a measure of PSII electron transport using chlorophyll fluorescence.’
      • ‘Leaves were kept in darkness for 30 min before recording the fluorescence parameters.’
      • ‘In fact, tyrosine fluorescence is blue shifted relative to tryptophan fluorescence.’
      • ‘The fluorescence spectrum of rose bengal is redshifted as the polarity of the solvent decreases.’
      • ‘The content of the fluorescence was determined using quinine fluorescence as a standard.’
      • ‘Tryptophan fluorescence is frequently used to learn about the properties of proteins.’
      light, lighting, radiance, gleam, glitter, brilliance, glow, glare, dazzle, flash, shimmer
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Origin

Mid 19th century: from fluorspar (which fluoresces), on the pattern of opalescence.

Pronunciation