exudation (n.)youdaoicibaDictYouDict[exudation 词源字典]
1610s, "process of oozing out;" 1620s, "that which is exuded," from Late Latin exudationem/exsudationem, noun of action from neuter past participle of exudere/exsudere "to ooze, exude" (see exude). Related: Exudate (n.).[exudation etymology, exudation origin, 英语词源]