1. The product obtained by partial hydrolysis of collagen, occurring in sheets, flakes, shreds, or as a coarse or fine powder, insoluble in cold water but soluble in hot water: Gelatin is used in many pharmaceutical preparations, in formulations for histochemical examinations, as an ingredient of bacteriologic culture media, such as a food, as a plasma extender, and as an absorbable film or sponge in operative procedures.
2. An edible jelly produced from such material: When Mrs. Smart was making ham, she used gelatin with sugar in order to preserve it in clean, tightly closed jars.

A preparation made of equal parts of gelatin and glycerin; a firm mass liquefying at gentle heat: Glycerogelatin is used as a vehicle for suppositories and urethral bougies.

A "bougie" (boo ZHEE, BOO zhee) is a slender cylindrical instrument of rubber, waxed silk, or other material, for introduction into the body passages, such as the urethra, anus, or other canal.

Glycerogelatin,is also defined as a suppository, particularly for insertion into the urethra.