1. rules or regulations governing visits between members of the opposite sex in dormitories or residential facilities
Usage: college/university context; informal
2. the parietal bones of the skull
Usage: anatomy; medical

Examples

• The college enforced strict parietals that prohibited overnight guests.
• Students complained about the outdated parietals in the dormitory handbook.
• Parietals were relaxed during finals week to allow study groups.
• The anatomy professor pointed out the parietals on the skull model.
• A fracture to the parietals required immediate medical attention.
• The university updated its parietals to reflect modern social norms.