Definition of flor in US English:



  • Yeast allowed to develop in a whitish film on the surface of dry (fino) sherries and similar wines during fermentation.

    • ‘It is easy to know if a cask has been affected since the flor develops as a layer on top of the wine in the cask.’
    • ‘In contrast with the fermentation strains, the flor yeasts have a permanent presence in the winery, dating from the 19th century in the Jerez region of southern Spain.’
    • ‘At slightly higher concentrations, it contributes to the distinctive and characteristic smell of fino sherry and other flor wines.’


Late 19th century: from Spanish, literally ‘flower’.