peritoneum
noun
peri·to·ne·um ˌper-ə-tə-ˈnē-əm 
plural peritoneums ˌper-ə-tə-ˈnē-əmz or peritonea ˌper-ə-tə-ˈnē-ə
or peritonea ˌper-ə-tə-ˈnē-ə : the smooth transparent serous membrane that lines the cavity of the abdomen of a mammal and is folded inward over the abdominal and pelvic viscera
peritoneal
ˌper-ə-tə-ˈnē-əl
adjective peritoneally
ˌper-ə-tə-ˈnē-ə-lē
adverb 
Example Sentences
Recent Examples on the Web Using the peritoneum in gender confirmation surgery was popularized by Dr. Lee Zhao at New York University in recent years, and Dr. Kamol is one of the few surgeons in the world performing PPT. 
Mailee Osten-tan, Longreads, 8 June 2022 There are potential complications of peritoneal dialysis, including infection of the peritoneum. Dr. Keith Roach, oregonlive, 9 Feb. 2022 This then would result in the inflammation of your peritoneum, the lining of the insides of your abdomen, called peritonitis, which can be a life-threatening condition and is a surgical emergency. Bruce Y. Lee, Forbes, 31 Jan. 2022 Think of the parietal peritoneum as a membrane corset that wraps around the center of your body and abdomen, says Gregg. Kelly O'mara, Outside Online, 8 May 2020 The current operating theory, though, is that these stitches are caused by irritation of the parietal peritoneum. Kelly O'mara, Outside Online, 8 May 2020 Your abdominal lining, called the peritoneum, has two layers. Ali Nolan, SELF, 6 Dec. 2021 Ovarian cancer may also be in the fallopian tubes, the structures that move your egg from the ovary to your uterus each month, or the peritoneum, the tissue lining that covers organs in your abdomen, the CDC says. Korin Miller, Health.com, 15 June 2021 This is the first category because endometriosis often involves the peritoneum as a baseline characteristic. Cassie Shortsleeve, SELF, 25 Sep. 2019 See More
Mailee Osten-tan, Longreads, 8 June 2022 There are potential complications of peritoneal dialysis, including infection of the peritoneum. Dr. Keith Roach, oregonlive, 9 Feb. 2022 This then would result in the inflammation of your peritoneum, the lining of the insides of your abdomen, called peritonitis, which can be a life-threatening condition and is a surgical emergency. Bruce Y. Lee, Forbes, 31 Jan. 2022 Think of the parietal peritoneum as a membrane corset that wraps around the center of your body and abdomen, says Gregg. Kelly O'mara, Outside Online, 8 May 2020 The current operating theory, though, is that these stitches are caused by irritation of the parietal peritoneum. Kelly O'mara, Outside Online, 8 May 2020 Your abdominal lining, called the peritoneum, has two layers. Ali Nolan, SELF, 6 Dec. 2021 Ovarian cancer may also be in the fallopian tubes, the structures that move your egg from the ovary to your uterus each month, or the peritoneum, the tissue lining that covers organs in your abdomen, the CDC says. Korin Miller, Health.com, 15 June 2021 This is the first category because endometriosis often involves the peritoneum as a baseline characteristic. Cassie Shortsleeve, SELF, 25 Sep. 2019 See More Word History
Etymology
Middle English, from Late Latin, from Greek peritonaion, neuter of peritonaios stretched around, from peri- + teinein to stretch — more at thin
First Known Use
15th century, in the meaning defined above
Medical Definition
peritoneum
noun
peri·to·ne·um
variants or chiefly British peritonaeum
ˌper-ət-ᵊn-ˈē-əm
plural peritoneums or chiefly British peritonaeums -ˈē-əmz or peritonea or chiefly British peritonaea -ˈē-ə
or peritonea or chiefly British peritonaea -ˈē-ə : the smooth transparent serous membrane that lines the cavity of the abdomen of a mammal, is folded inward over the abdominal and pelvic viscera, and consists of an outer layer closely adherent to the walls of the abdomen and an inner layer that folds to invest the viscera see parietal peritoneum, visceral peritoneum compare mesentery sense 1