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pericardium
 

Definitions from WordNet

Noun pericardium has 1 sense
  1. pericardium - a double-layered serous membrane that surrounds the heart
    --1 is a kind of     serous membrane, serosa
    --1 has parts: epicardium, visceral pericardium; parietal pericardium

Definitions from the Web

Pericardium

Noun: The pericardium is a double-walled sac that surrounds the heart and plays a crucial role in protecting and lubricating the heart.

Example sentence: The surgeon carefully examined the pericardium for any signs of infection.

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