The difference between Accession and Deaccession
When used as nouns, accession means a coming to, whereas deaccession means the disposal of objects in this way.
When used as verbs, accession means to make a record of (additions to a collection), whereas deaccession means to officially remove an object from a museum, art gallery or library so that it may be sold.
check bellow for the other definitions of Accession and Deaccession
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Accession as a noun:
A coming to; the act of acceding and becoming joined
Examples:
"a king's accession to a confederacy"
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Accession as a noun:
Increase by something added; that which is added; augmentation from without.
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Accession as a noun (legal):
A mode of acquiring property, by which the owner of a corporeal substance which receives an addition by growth, or by labor, has a right to the part or thing added, or the improvement (provided the thing is not changed into a different species).
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Accession as a noun (legal):
The act by which one power becomes party to engagements already in force between other powers.
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Accession as a noun:
The act of coming to or reaching a throne, an office, or dignity.
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Accession as a noun (medicine):
The invasion, approach, or commencement of a disease; a fit or paroxysm.
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Accession as a noun:
Agreement.
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Accession as a noun:
Access; admittance.
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Accession as a verb (transitive):
To make a record of (additions to a collection).
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Deaccession as a verb:
To officially remove an object from a museum, art gallery or library so that it may be sold.
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Deaccession as a noun:
The disposal of objects in this way.