Definition

1. Noun:
   • The main cavity of the peritoneum: The "greater peritoneal sac" is the primary, large compartment within the abdominal cavity that is lined by the peritoneum. It is the space where most abdominal organs, such as the stomach, liver, and intestines, are located.
   • A potential space between layers of the peritoneum: It refers to the expansive cavity that exists between the parietal peritoneum (lining the abdominal wall) and the visceral peritoneum (covering the organs). This space normally contains a small amount of lubricating fluid.

Usage Examples

• Noun:
  • During the surgery, the surgeon explored the greater peritoneal sac for any signs of infection.
  • Fluid accumulation in the greater peritoneal sac is a condition known as ascites.

Advanced Usage

• "Communicates with the lesser sac": In anatomical descriptions, the greater peritoneal sac is noted to be connected to the smaller "omental bursa" or "lesser sac" via the epiploic foramen (foramen of Winslow).
  • The greater peritoneal sac communicates with the lesser sac through a small opening.

Variants and Related Words

• Peritoneal cavity: A more general synonym for the greater peritoneal sac.
• Lesser peritoneal sac (Omental bursa): A smaller peritoneal compartment located behind the stomach, connected to the greater sac.
• Peritoneum: The serous membrane that lines the abdominal cavity and forms the sac.

Synonyms

• General peritoneal cavity
• Main peritoneal compartment

Notes on Meaning

This is a specific anatomical term. In non-medical contexts, this term is not used. Its meaning is fixed within the fields of anatomy, surgery, and medicine, referring precisely to the large, principal space of the peritoneal lining.

Noun

1. the interior of the peritoneum; a potential space between layers of the peritoneum