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 calf's- foot jelly, isinglass, glue, etc. It is used as food, but its nutritious qualities are of a low order.
- A colorless or slightly yellow, transparent, brittle protein formed by boiling the specially prepared skin, bones, and connective tissue of animals and used in foods, drugs, and photographic film.
- Any of various similar substances.
- A jelly made with gelatin, used as a dessert or salad base.
- A thin sheet made of colored gelatin used in theatrical lighting. Also called gel.