A liquid appearing like a heavy oil, colorless or
   yellowish, and consisting of a mixture of several glycerin salts of
   nitric acid, and hence more properly called glycerin nitrate. It is
   made by the action of nitric acid on glycerin in the presence of
   sulphuric acid. It is extremely unstable and terribly explosive. A very
   dilute solution is used in medicine as a neurotic under the name of
   glonion.