Definition of pediplain in English:

pediplain

noun

Geology
  • An extensive plain formed in a desert by the coalescence of neighbouring pediments.

    • ‘Individual pediments can coalesce to form extensive surfaces called pediplains, commonly several thousand square kilometres in extent.’

Origin

1930s: from pediment + plain.

Pronunciation

pediplain

/ˈpɛdɪpleɪn/