RNA /ˌɑr(ˌ)ɛnˈe/
  RNA
       n : (biochemistry) a long linear polymer  of nucleotides found
           in the nucleus but mainly in the cytoplasm of a cell
           where it is associated with microsomes; it transmits
           genetic information from DNA to the cytoplasm and
           controls certain chemical processes in the cell;
           "ribonucleic acid is the genetic material of some
           viruses" [syn: ribonucleic acid]