in vertebrates, the thin, closed, membranous sac surrounding the heart and the roots of the great blood vessels and containing a clear serous liquid
Origin of pericardiumModern Latin from Classical Greek perikardion, neuter of perikardios, around the heart from peri-, around + kardia, heart
The membranous sac filled with serous fluid that encloses the heart and the roots of the aorta and other large blood vessels.
Origin of pericardiumNew Latin from Greek perikardion from perikardios around the heart peri- peri- kardiā heart ; see kerd- in Indo-European roots.
- per′i·car′di·al per′i·car′di·ac′
- (anatomy, cardiology) A serous membrane that surrounds the heart allowing it to contract.