Definition of ventifact in English:

ventifact

noun

Geology
  • A stone shaped by the erosive action of wind-blown sand.

    • ‘In reality, their makers are definitely of this land, for it is the wind and sand that have formed these strange offerings, called ventifacts.’
    • ‘The camera becomes the eye of the wind, forming ventifacts.’
    • ‘During intervening dry periods, winds scour the fan surfaces and sandblast exposed gravel clasts to produce smooth faceted ventifacts.’

Origin

Early 20th century: from Latin ventus wind + factum, neuter past participle of facere make.

Pronunciation:

ventifact

/ˈvɛntɪfakt/