Source : WordNet®

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}]