noun. A mixture of butter and suger. A mixture of butter and suger. The definition of a mixture is a combination of different things, or the state or act of being mixed. 1  An example of a mixture is a bowl of butter, sugar and salt. 2  An example of mixture is the process of combining flour and baking soda.
deuterium oxide. An isotope of water in which hydrogen has been displaced by its isotope deuterium. Its properties differ from ordinary water in that it has higher freezing and boiling points and is incapable of supporting life.
At present, deuterium is used in the production of hydrogen (Li-Hy) fuel now used in Canada, America, Germany and some parts of Sweden to provide fuel for cars, trucks, jet planes, including solid hydrogen for spacecrafts Challenger and Columbia.