Why is europe called “the peninsula of peninsulas”? what is a peninsula?

 Europe is called "The peninsula of peninsulas" because Europe is a relatively small, elongated appendage to Asia, and that a large part of Europe is made up of peninsulas. 

A peninsula is kind of like a island surrounded by a body of water. 

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The definition of peninsula is a body of that that is surrounded by water on three sides. Europe is connected to Asia on it's east side, but on the north, south, and west sides Europe is surrounded by water. But because Europe has a rather odd shape it has many smaller peninsulas sticking off it's north, south, and west sides. This is why Europe is called the "peninsula of peninsulas".
A peninsula is a piece of land surrounded by water on three sides. Europe is apeninsula of the Eurasian supercontinent and is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, and the Mediterranean, Black, and Caspian Seas to the south.
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