(Britain dialectal or obsolete) The membrane enclosing the intestines; the peritoneum, hence loosely, the intestines; the lower part of the abdomen; belly.
“They offered whale-watching cruises and restored the old buildings that perched on pilings along the rim of the harbour.”
“She was following the rim of the crater towards him.”
rimfire
A type of firearmcartridge where the primer is in the back rim, rather than a central primer cap. They are cheap to produce but cannot be reloaded with powder.