per·i·car·di·um
noun/ˌperiˈkɑːdiəm/
/ˌperiˈkɑːrdiəm/
(plural pericardia
(anatomy)/ˌperiˈkɑːdiə/
/ˌperiˈkɑːrdiə/
)- the membrane (= thin layer) that surrounds the heart
包围心脏的膜（=薄层） Word Originlate Middle English: modern Latin, from Green perikardion, from peri ‘around’ + kardia ‘heart’.