What is land reclaimed from sea especially in the Netherlands?

Land reclaimed from the sea, especially in the Netherlands, is called a polder. Polders are areas of low-lying land that have been enclosed and drained to create usable agricultural land. The Netherlands is well-known for its polders, which have been created by building dikes and pumping water out of the land. Polders are an important part of the Dutch landscape and contribute significantly to the country's agricultural productivity.