[Fr., from L. gluten, glue.] A sticky animal substance or kind of impure gelatine, hard, and of a bright brown color. When melted it is adhesive and tenacious. It is made from the horns, hoofs, and sinews of various animals, or from scrapings and cuttings of their skins. These are cleansed, boiled, strained, boiled again, poured into layers or cut into squares and dried. Glue is very useful to the joiner and cabinet-maker.