心しん膜まくしんまくじ字FuriganaMeanings1nounpericardium; pericardial sacanatomy›Anatomical term for the double-layered membrane surrounding the heart.心しん膜まくは心しん臓ぞうを包つつむ薄うすい膜まくです。The pericardium is a thin membrane that surrounds the heart.
