pepsinogen. a zymogen secreted by the chief cells of the gastric glands and converted into pepsin in the presence of gastric acid or of pepsin itself.plasma pepsinogen. high levels are indicative of extensive mucosal damage in the abomasum, as in ostertagiasis in ruminants. proenzyme formed and secreted by the chief cells of the gastric mucosa; the acidity of the gastric juice and pepsin itself remove 42 amino acid residues from pepsinogen to form active pepsin. Synonym(s): propepsin. [ pepsin + G. -gen, producing].
Princeton's WordNet(5.00 / 1 vote)Rate this definition: 1  reed(noun) tall woody perennial grasses with hollow slender stems especially of the genera Arundo and Phragmites.
n. 1  1. Music A wind instrument of the trumpet class, having three valves operated by pistons. 2  2. (also kÃ´râ²nÄ­t) A piece of paper twisted into a cone and used to hold small wares such as candy or nuts. 3  3. (also kÃ´râ²nÄ­t) A headdress, often cone-shaped, worn by women in the 12th and 13th centuries.