Oxygen: n. An odorless, tasteless gaseous element (symbol O) that makes up about one-fifth
                                      of earth's atmosphere by volume.  Essential for the survival of human life.

                  OXYGEN n. that human endeavor which gives an individual the greatest
                                reward, satisfaction, or sense of accomplishment and self-worth.
                                Essential life element providing daily happiness and satisfaction
                                with the promise of a better tomorrow.  Increased amounts needed
                                in stressful times.