Gelatin

Animal jelly glutinous material obtained from animal tissues by prolonged boiling Specifically Physiol Chem a nitrogeneous colloid not existing as such in the animal body but formed by the hydrating action of boiling water on the collagen of various kinds of connective tissue as tendons bones ligaments etc Its distinguishing character is that of dissolving in hot water and forming a jelly on cooling It is an important ingredient of calfs foot jelly isinglass glue etc It is used as food but its nutritious qualities are of a low order