n. [ Gr. pe`psis a cooking, digesting, digestion, fr. pe`ptein, pe`ssein, to cook, digest: cf. F. pepsine. Cf. Dyspepsia. ] (Physiol. Chem.) A proteolytic enzyme (MW 34, 500) contained in the secretory glands of the stomach. In the gastric juice it is united with dilute hydrochloric acid (0.2 per cent, approximately) and the two together constitute the active portion of the digestive fluid. It degrades proteins to proteoses and peptides, and is notable for having a very low pH optimum for its activity. It is the active agent in the gastric juice of all animals. [ 1913 Webster + PJC ]
☞ As prepared from the glandular layer of pigs' or calves' stomachs it constitutes an important article of pharmacy. [ 1913 Webster ]
n. [ Pepsin + -gen. ] (Physiol. Chem.) A proenzyme, the antecedent of the enzyme pepsin. A substance contained in the form of granules in the peptic cells of the gastric glands. It is readily convertible into pepsin. Also called propepsin. [ 1913 Webster ]
แสดงได้ทั้งความหมายของคำเดี่ยว และคำผสม ได้อย่างถูกต้อง
เช่น Secretary of State=รัฐมนตรีต่างประเทศของสหรัฐฯ (ในภาพตัวอย่าง),
High school=โรงเรียนมัธยมปลาย
