copy number

noun2

1. •
   The number of copies of a gene or plasmid within a cell's genome.

   • "Reconstruction" or "titration" experiments consisting of amounts of the linear cloned cDNA equivalent to various gene copy numbers in the genomic DNA are run on the same gel. — 1985
2. •
   The identification number assigned to a specific copy of a work.

   • In other words, there was no way to correlate a book's barcode number, by which it was filed in the computer, to its copy number on the shelf list. — 1987