pericardium
peri·car·di·um
noun \-ˈkär-dē-əm\ plural peri·car·dia\-dē-ə\
Definition of PERICARDIUM
1
: the conical sac of serous membrane that encloses the heart and the roots of the great blood vessels of vertebrates
2
: a cavity or space that contains the heart of an invertebrate and in arthropods is a part of the hemocoel
See Origin of PERICARDIUM
Middle English, from Medieval Latin, from Greek perikardion, neuter of perikardios around the heart, from peri- + kardia heart — more at heart
First Known Use: 15th century
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