From Middle English urinal, urynal, orynal, from Old French urinal, orinal (“vessel for urination”), from Latin ūrīnālis (“urinary”). Use for plumbing fixtures attested from 1851.
Of or pertaining to. Adjectival suffix appended to various words, often nouns, to produce an adjective form. Often added to words of Latin origin, but used with other words also. · Forming nouns, especially of verbal action.