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.
Reeded instruments include the clarinet, oboe, saxophone and harmonica. Wind instruments that do not use reeds include the flute, recorder, tin whistle and trumpet. Reeded instruments are either wet reed or dry reed instruments. Wet reeds are moistened by the breath of the musician.Wind instruments that use some means other than the musician's breath to move air are dry reed instruments. Most reeded wind instruments used in traditional Irish music are dry reed instruments.et reeds are moistened by the breath of the musician. Wind instruments that use some means other than the musician's breath to move air are dry reed instruments. Most reeded wind instruments used in traditional Irish music are dry reed instruments.