1. An essential constituent of gastric juice, a preparation of which, extracted from the stomachs of calves, sheep, &c., is used in medicine.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• -pepsin,
• oepsine,
• 0epsine,
• pwpsine,
• pspsine,
• pdpsine,
• prpsine,
• p4psine,
• p3psine,
• pe-sine,
• pe0sine,
• pepaine,
• pepzine,
• pepsinne,
• pepsinee,
• pepsene,
• pebscine,
• pepscine,
• peupcine,
• pepsiney

The plural of the "pepsine" can be the "pepsines".

The singular of the "pepsine" can be the "pepsine".