peritoneumist
Peritoneumist is a term that may be used to describe a person who studies or works with the peritoneum, the thin serous membrane that lines the abdominal cavity and covers abdominal organs. The word is formed from peritoneum plus the agent noun suffix -ist, indicating a practitioner or specialist. It is not a standard or widely recognized title in contemporary medical or anatomical literature, and its usage is largely informal or fictional.
In practice, individuals who might be described as peritoneists would include anatomists, physiologists, pathologists, or surgeons
Because the term is uncommon, more standard descriptors are preferred, such as peritoneal anatomist, peritoneal physiologist,
The term is more likely to appear in speculative fiction or early scholarly uses than in routine