de-duplication
nounUK /ˌdiː.djuː.plɪˈkeɪ.ʃən/
US /ˌdiː.duː.plɪˈkeɪ.ʃən/
The act of removing copies so only one of each thing is left.
The teacher did a de-duplication of the class list so no name appeared twice.
OTHER MEANINGS
2. In computing, the process of storing only one copy of repeated data to save space.
Data de-duplication cut the backup size in half.
3. The act of merging repeated records in a list or database into a single entry.
The mailing list needed de-duplication before the letters were sent.
4. The removal of repeated tasks or steps in a process to make it more efficient.
De-duplication of the approval steps made the workflow faster.