An animal glue is an adhesive that is created by prolonged boiling of animal connective tissue.
These protein colloid glues are formed through hydrolysis of the collagen from skins, bones, tendons, and other tissues, similar to gelatin. The word "collagen" itself derives from Greek κόλλα kolla, glue. These proteins form a molecular bond with the glued object.
Stereotypically, the animal in question is a horse, and horses that are put down are often said to have been "sent to the glue factory." However, other animals are also used, including rabbits and fish.
Read more about Animal Glue: Types and Uses
Famous quotes containing the words animal and/or glue:
“Most men would feel shame if caught preparing with their own hands precisely such a dinner, whether of animal or vegetable food, as is every day prepared for them by others. Yet till this is otherwise we are not civilized, and, if gentlemen and ladies, are not true men and women. This certainly suggests what change is to be made.”
—Henry David Thoreau (1817–1862)
“Open your mouth, Willard, and I’ll smear Krazy Glue on your bed pan.”
—Blake Edwards (b. 1922)