pericardium
Concise Oxford English Dictionary © 2008 Oxford University Press:
pericardium /ˌpɛrɪˈkɑːdɪəm/
▶noun (pl. pericardia /-dɪə/) Anatomy the membrane enclosing the heart.
– derivatives
pericardial adjective,
pericarditis noun.
pericardial adjective,
pericarditis noun.
– origin ME: mod. L., from Gk perikardion, from peri ‘around’ + kardia ‘heart’.
'pericardium' also found in these Oxford entries:

