little girls' room

Etymology
Originally from the need to find public lavatories for children, possibly by analogy with the somewhat earlier-attested, but already in broader euphemistic use by its first known appearance in John O'Hara's BUtterfield 8.

Noun

 * : a public lavatory intended for use by women.
 * 1) * 1935, John O'Hara, BUtterfield 8, Ch. ix, page 279:
 * The women's toilet (as distinguished from the ladies' room in a speakeasy, the johnny at school, the little girls' room at a party in an apartment, and the wash-my-hands on a train) was clean enough.
 * 1) A room belonging to or used by little girls, particularly their bedroom.

Synonyms

 * See Thesaurus:bathroom