replicons

/R EH1 P L IH0 K AO0 N Z/
noun
  1. 1

    A DNA molecule or a region of DNA that replicates as an individual unit. A replicon may be, for instance, a chromosome, a plasmid or a phage.

Source: https://en.wiktionary.org/wiki/replicon, https://en.wiktionary.org/wiki/replicons