bibliothecary (n.)

"librarian," 1610s, from Latin bibliothecarius "a librarian," noun use of an adjective, from bibliotheca "library, room for books; collection of books," from Greek bibliothēkē, literally "book-repository," from biblion "book" (see biblio-) + thēkē "case, chest, sheath" (from suffixed form of PIE root *dhe- "to set, put"). An earlier form in English was bibliothecar (1580s), and compare bibliothec.

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