noun
denudation; ablation
Geology term for the wearing away of the earth's surface by natural processes such as erosion and weathering.
削摩作用によって地形が変化する。
The landscape changes due to denudation.
noun
scraping; wearing down
General physical sense of scraping or wearing something down by friction or abrasion; less common than the geological use.
機械部品の削摩を防ぐために潤滑油を使う。
Use lubricant to prevent scraping of machine parts.