单词	accretion
释义	accretionac‧cre‧tion /əˈkriːʃən/ noun [countable, uncountable] formal Word Origin WORD ORIGINaccretion Origin: 1600-1700 Latin accretio, from accrescere, from ad- ‘to’ + crescere ‘to grow’ Examples EXAMPLES FROM THE CORPUS Coral growth and the accretion of sediments in coastal mangroves will compensate. Erosion or accretion of sand by wind action is evident throughout and soil genesis is truncated by erosion or fossilised by deposition. The public sector continued to grow through a process of bureaucratic accretion financed by economic growth. The surface of the Moon is the result of accretion and of subsequent impacts and slow-acting erosional processes. This is perhaps because the later accretions are somewhat dwarfed amid the towering Gothic architecture. 1a layer of a substance which slowly forms on something2a gradual process by which new things are added and something gradually changes or gets bigger
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