pe·ne·plain

[pee-nuh-pleyn, pee-nuh-pleyn]
noun Geology.
an area reduced almost to a plain by erosion.
Also, pe·ne·plane.


Origin:
1885–90; pene- + plain1

pe·ne·pla·na·tion [pee-nuh-pluh-ney-shuhn] , noun
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
peneplain or peneplane (ˈpiːnɪˌpleɪn, ˌpiːnɪˈpleɪn, ˈpiːnɪˌpleɪn, ˌpiːnɪˈpleɪn) [Click for IPA pronunciation guide]
 
n
a relatively flat land surface produced by a long period of erosion
 
[C19: from pene- + plain1]
 
peneplane or peneplane
 
n
 
[C19: from pene- + plain1]
 
penepla'nation or peneplane
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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00:10
Peneplain is always a great word to know.
So is quincunx. Does it mean:
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
a gadget; dingus; thingumbob.
Example sentences
Through a long era of relative crustal stability the old mountains were eroded to a vast plain, or peneplain, close to sea-level.
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