Noun
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(law) an increase in a beneficiary's share in an estate (as when a co-beneficiary dies or fails to meet some condition or rejects the inheritance)
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(geology) an increase in land resulting from alluvial deposits or waterborne sediment
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(biology) growth by addition as by the adhesion of parts or particles
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(astronomy) the formation of a celestial object by the effect of gravity pulling together surrounding objects and gases
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something contributing to growth or increase
"he scraped away the accretions of paint"
"the central city surrounded by recent accretions"
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an increase by natural growth or addition