peneplain[pē′nə plān′, pen′ə-]
peneplain definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
☆ or peneplane
land worn down by erosion almost to a level plain
Origin: Classical Latin pene, paene, almost (see passion) plush plain, plane
peneplain definition by American Heritage Dictionary
A nearly flat land surface representing an advanced stage of erosion.
Origin: pene-, almost (from Latin paene) + plain.