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Pon·tine Marshes(pŏn′tēn, -tīn)
An area of central Italy between the Tyrrhenian Sea and the Apennine foothills. Formerly a malarial breeding ground, the land was drained during the 1930s to produce fertile farmland.
(Placename) an area of W Italy, southeast of Rome: formerly malarial swamps, drained in 1932–34 after numerous attempts since 160 bc had failed. Italian name: Agro Pontino
Pon′tine Marsh′es(ˈpɒn tin, -taɪn)
an area in W Italy, SE of Rome: formerly marshy, now drained.