Word not found in any official scrabble dictionaries.
"Rna" Definition
noun
Any of various nucleic acids that contain ribose and uracil as structural components and are associated with the control of cellular chemical activities .
Source: Merriam-Webster
Ribonucleic acid, a nucleic acid present in all living cells. Its principal role is to act as a messenger carrying instructions from DNA for controlling the synthesis of proteins, although in some viruses RNA rather than DNA carries the genetic information.
Source: Oxford Dictionary