Definition of pediplane in US English:

pediplane

noun

Geomorphology
  • A piedmont slope in arid and semi-arid regions comprising a pediment and a peripediment (or just one of these, if the other is not present).

Origin

1940s. From classical Latin pedi- + plane. Compare earlier pediplain.

Pronunciation

pediplane

/ˈpɛdɪpleɪn/