accession
WIKIMEDIA DISAMBIGUATION PAGE
Acceding; Accessioned; Accede; Accedes; Acceded; Accedence; Accedences; Accession (disambiguation)
¦ noun
1. the attainment of a position of rank.
2. the formal acceptance of a treaty or joining of an association.
3. a new item added to a collection of books or artefacts.
¦ verb record the addition of (a new item) to a library or museum.