perfusion (n.)youdaoicibaDictYouDict[perfusion 词源字典]
1570s, from Middle French perfusion and directly from Latin perfusionem (nominative perfusio) "a pouring over," noun of action from past participle stem of perfundere "pour out," from per- "throughout" (see per) + fundere "pour" (see found (v.2)).[perfusion etymology, perfusion origin, 英语词源]