LAVATORIAL
Meaning of LAVATORIAL in English
lav ‧ a ‧ to ‧ ri ‧ al /ˌlævəˈtɔːriəl◂/ BrE AmE adjective British English
lavatorial jokes are about going to the toilet
Longman Dictionary of Contemporary English.
Longman - Словарь современного английского языка.
2012