peneplain

[pee-nuh-pleyn, pee-nuh-pleyn] /ˈpi nəˌpleɪn, ˌpi nəˈpleɪn/

noun, Geology

an area reduced almost to a plain by erosion.

Also, peneplane.

Origin

1885-90; pene- + plain¹

Related forms

peneplanation

[pee-nuh-pluh-ney-shuh n] /ˌpi nə pləˈneɪ ʃən/ (Show IPA), noun

Examples from the web for peneplain

Through a long era of relative crustal stability the old mountains were eroded to a vast plain, or peneplain, close to sea-level.

British Dictionary definitions for peneplain

/ˈpiːnɪˌpleɪn; ˌpiːnɪˈpleɪn/

noun

a relatively flat land surface produced by a long period of erosion

Derived Forms

peneplanation, noun

Word Origin

C19: from pene- + plain1