Mannitan n. : A white amorphous or crystalline substance obtained by the partial dehydration of mannite.

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Taxonomy
Manhattan, the New York, city, New York City, borough, United States, population, New York, New York County, island, square miles, neighborhoods, The Bronx, streets, Manhattan Island, the Hudson River, crime, Staten Island.

Defination from the web:
Manhattan, famous for the architectural landmarks, Empire State Building, Chrysler Building, and the former World Trade Center twin towers.