Definition of graupel in English:

graupel

noun

  • [mass noun] Small particles of snow with a fragile crust of ice; soft hail.

    • ‘Derived from the German word for barley, graupel is created when supercooled water droplets coat a snowflake with ice or when a supercooled drop develops an outer coating of ice without freezing through.’
    • ‘In this work the growth, motion and charging of graupel particles are simulated by computer.’
    • ‘Notice for this wind field that graupel falls rapidly to the surface and drifts only a short distance downwind.’
    • ‘When this process continues so that the shape of the original snow crystal is no longer identifiable, the resulting crystal is referred to as graupel.’
    • ‘Graupel is a wonderful form of precipitation. It is not snow, not hail, not sleet, and definitely not rain.’

Origin

Late 19th century: German Graupel, back-formation from graupeln to hail with soft hailstones, from Graupe cereal grain.

Pronunciation:

graupel

/ˈɡraʊp(ə)l/