Harry Thurston Peck, Harpers Dictionary of Classical Antiquities (1898)

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Forĭca

（θάκος), generally in the plural Forĭcae. A set of public water-closets, like the cabinets d'aisance of French cities, and put at the disposal of the passers-by for a small fee. They were farmed out by contractors, as we learn from Juvenal (iii. 38). See the anecdote in Theophrast. Char. 14.The foricae are not to be confounded with the public urinals (dolia) set at the street corners, and whose contents were sold to the laundries for bleaching clothes. See Fullo.