peri·​car·​di·​um | \ ˌper-ə-ˈkär-dē-əm How to pronounce pericardium (audio) \
plural pericardia\ ˌper-​ə-​ˈkär-​dē-​ə How to pronounce pericardia (audio) \

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

Examples of pericardium in a Sentence

Recent Examples on the Web As a pediatric emergency medicine physician, Smith said he's seen pellets pierce the skull and enter the brain and lodge near the pericardium, the sac that protects the heart. Scottie Andrew, CNN, "Mom was right. Eye injuries from paintball and BB guns are on the rise," 25 Nov. 2019 Bale is still out of contention with a calf muscle injury that prevented him from helping Wales to qualify for next year's World Cup, while strong right-back Dani Carvajal is struggling with a viral pericardium infection., "Real Madrid vs Eibar Preview: Previous Encounter, Key Men, Team News & More," 21 Oct. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'pericardium.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of pericardium

15th century, in the meaning defined at sense 1

History and Etymology for pericardium

Middle English, from Medieval Latin, from Greek perikardion, neuter of perikardios around the heart, from peri- + kardia heart — more at heart

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The first known use of pericardium was in the 15th century

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Cite this Entry

“Pericardium.” Dictionary, Merriam-Webster, Accessed 2 Jun. 2020.

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More Definitions for pericardium


peri·​car·​di·​um | \ ˌper-ə-ˈkärd-ē-əm How to pronounce pericardium (audio) \
plural pericardia\ -​ē-​ə How to pronounce pericardia (audio) \

Medical Definition of pericardium

: the conical sac of serous membrane that encloses the heart and the roots of the great blood vessels of vertebrates and consists of an outer fibrous coat that loosely invests the heart and is prolonged on the outer surface of the great vessels except the inferior vena cava and a double inner serous coat of which one layer is closely adherent to the heart while the other lines the inner surface of the outer coat with the intervening space being filled with pericardial fluid

More from Merriam-Webster on pericardium

Britannica English: Translation of pericardium for Arabic Speakers Encyclopedia article about pericardium

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