释义 |
ero·sion \ə̇ˈrōzhən, ēˈ-\ noun (-s) Etymology: Middle French, from Latin erosion-, erosio, from erosus (past participle of erodere to erode) + -ion-, -io -ion — more at erode 1. a. (1) : the superficial destruction of a surface area of tissue (as mucous membrane) by inflammation, ulceration, or trauma < erosion of the uterine cervix > < gizzard erosion in chicks > (2) : progressive loss of the hard substance of a tooth b. : corrosion 1a 2. a. : the general process whereby materials of the earth's crust are worn away and removed by natural agencies including weathering, solution, corrasion, and transportation; specifically : land destruction and simultaneous removal of particles (as of soil) by running water, waves and currents, moving ice, or wind < stream erosion > < glacial erosion > — compare denudation b. : surface destruction of a metal or refractory material effected by the abrasive or the corrosive and abrasive action of a moving liquid or gas and often accelerated by solid particles in suspension < range errors due to gun erosion > < severe erosion of the furnace lining caused by the scouring motion of molten slag > c. : even disintegration of a paint surface caused by chalking and washing away 3. : an instance or product of erosion < a circular erosion on the skin half an inch in diameter > < a canyon with red tower-shaped erosions > 4. : progressive impairment or destruction as if by eating or wearing away (as of resources, strength, or effectiveness) : depletion, deterioration < erosion of real earnings by inflation > < the great ideals of liberty and equality are preserved against … the erosion of small encroachments — B.N.Cardozo > |