plasmids

/P L AE0 Z M IH1 D Z/
noun
  1. 1

    A loop of double-stranded DNA that is separate from and replicates independently of the chromosomes, most commonly found in bacteria, but also in archaeans and eukaryotic cells, and used in genetic engineering as a vector for gene transfer.

Source: https://en.wiktionary.org/wiki/plasmid, https://en.wiktionary.org/wiki/plasmids