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English definition of “accretion”

accretion

noun [C or U] uk   /əˈkriː.ʃən/ formal us  
a gradual increase or growth by the addition of new layers or parts: The fund was increased by the accretion of new shareholders. The room hadn't been cleaned for years and showed several accretions of dirt and dust.
(Definition of accretion from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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