A white, amorphous, tasteless substance resembling
   starch, soluble in water to an opalescent fluid. It is found abundantly
   in the liver of most animals, and in small quantity in other organs and
   tissues, particularly in the embryo. It is quickly changed into sugar
   when boiled with dilute sulphuric or hydrochloric acid, and also by the
   action of amylolytic ferments.