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BNC: 22082 COCA: 17492

accretion

noun
/əˈkriːʃn/
/əˈkriːʃn/
(specialist or formal)
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  1. [countable] a layer of a substance or a piece of matter that is slowly added to something積聚層；堆積層
  2. [uncountable] the process of new layers or matter being slowly added to something堆積，積聚（過程）
    • the accretion of sand by wind action風作用下沙子的堆積
    3. Word Originearly 17th cent.: from Latin accretio(n-), from accrescere ‘become larger’, from ad- ‘to’ + crescere ‘grow’.

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