Definition of storm glass in English:

storm glass

noun

historical
  • A sealed tube containing a solution whose clarity is thought to change when storms approach.

    • ‘Observing the liquid in the storm glass was supposed to indicate changes in the weather.’
    • ‘FitzRoy described the various crystal shapes and patterns that would develop within the storm glass according to different wind directions and weather conditions.’
    • ‘If the liquid in this storm glass is clear, the weather should be bright and clear.’
    • ‘The water barometer, or storm glass, is of the type used since the 17th century to demonstrate variations in atmospheric pressure quickly and reliably.’
    • ‘The first storm glasses likely appeared around 1750, but their first documented shipboard use dates to the Beagle's famed 1831-36 circumnavigation.’