curator

Concise Oxford English Dictionary © 2008 Oxford University Press:
curator/kjʊəˈreɪtə(r)/

▶noun a keeper or custodian of a museum or other collection.

– derivatives
curatorial adjective,
curatorship noun.

– origin ME (denoting a pastor or a guardian of a minor): from OFr. curateur or, in later use, directly from L. curator, from curare (see cure).