Definition of "lavatorial"

The station interiors were also suffering. "The universal lavatorial glazed tiling is dirty and cracked, the paint is peeling, and there is a general air of decay," Guardian journalist Charles Cook wrote in a 1974 feature. But as Cook himself discovered, this decrepitness disguised the positives of Underground travel.

2021 December 29, Conrad Landin, “Glasgow Subway: a city institution”, in RAIL, number 947, page 45