pericardium (n.)youdaoicibaDictYouDict[pericardium 词源字典]
early 15c., Latinized form of Greek perikardion "(membrane) around the heart" (Galen), from peri (prep.) "around, about" (see peri-) + kardia "heart," from PIE root *kerd- (1) "heart" (see heart (n.)). Related: Pericardiac.[pericardium etymology, pericardium origin, 英语词源]