Lavatories pl. : of Lavatory

Example:


Taxonomy
toilet, public toilets, flush, lavatory, urinal, restroom, urine, gender, flush toilet, waste, bathroom, loo, United States, street, public restroom, washing, aircraft lavatory, fixture.

Defination from the web:
lavatories, or public conveniences are toilets that are accessible to the general public with common access from the street. ... Lavatories on aircraft consist of a sink, a waste bin, and a toilet. ...