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.
A sax reed is made of bamboo. The solidity depends on the demand of the notes intended to be played. The part that attaches the reed with the mouthpiece is called the ligature, which is made from leather, metal or plastic. The crook is the part that links the mouthpiece with the body.One end is cork, and fixes into the mouthpiece; the other is shaped like a joint of metal, fastened by screws to the body. sax is made in parts, which are assembled later to form the instrument. We will explain each part and the way it is produced to keep the information systematic and easier to understand.