conservatory (n.)youdaoicibaDictYouDict[conservatory 词源字典]
1560s, "preservative;" 1660s, "greenhouse," from stem of conservation + -ory. In sense "school for performing arts" it is recorded from 1842, from Italian conservatorio or French conservatoire, originally "hospital for foundlings in which musical education was given."[conservatory etymology, conservatory origin, 英语词源]