What is "sinuessa"

Sinuessa was a city of Latium, in the more extended sense of the name, situated on the Tyrrhenian Sea, about 10 km north of the mouth of the Volturno River (the ancient Vulturnus). It was on the line of the Via Appia, and was the last place where that great highroad touched on the sea-coast. The ruins of the city are located in the modern-day municipality of Mondragone, Campania, Italy.