peritoneal

American  

[per-i-tuhn-ee-uhl] / ˌpɛr ɪ tənˈi əl /

adjective

Anatomy.

1. relating to, by means of, or enclosed by the peritoneum, the membrane lining the abdominal cavity.

   Perforation of the ulcer may occur, with escape of stomach contents into the peritoneal cavity.

   In peritoneal dialysis, the lining of the abdominal cavity acts like the external filter to cleanse the blood.

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Other Word Forms

• peritoneally adverb
• preperitoneal adjective
• subperitoneal adjective
• transperitoneal adjective
• transperitoneally adverb

Etymology

Origin of peritoneal

peritone(um) ( def. ) + -al ¹ ( def. )

Example Sentences

Doctors determined she was suffering from kidney failure and needed ongoing treatment including chemotherapy and peritoneal dialysis.

From Los Angeles Times • Jan. 6, 2026

Amrit undergoes nine hours of peritoneal dialysis each night, a method of blood purification used when kidneys fail.

From BBC • Jul. 20, 2025

For example, BRCA1 carriers have a higher risk of pancreatic and peritoneal cancer, neither of which have a reliable screening tool.

From Salon • Oct. 17, 2024

Furthermore, rbNPs successfully suppressed the growth of tumors in mice having aggressive adenocarcinoma in their peritoneal cavity, without any adverse effects.

From Science Daily • Apr. 22, 2024

Such stagnations may be present in the small lymph-spaces within the connective tissue, or in the larger lymph-sacs, as the peritoneal, pleural, pericardial, and scrotal cavities.

From A System of Practical Medicine by American Authors, Vol. I Volume 1: Pathology and General Diseases by Various