bibliothecarius
From LSJ
ἔγνω δὲ φώρ τε φῶρα καὶ λύκος λύκον → the thief knows the thief and the wolf knows the wolf, and thief knows thief and wolf his fellow wolf, set a thief to catch a thief
Latin > English
bibliothecarius bibliothecarii N M :: librarian
Latin > English (Lewis & Short)
biblĭŏthēcārĭus: ii, m. id.,
I a librarian (late Lat.), M. Aurel. ap. Fronto Ep. ad M. Caes. 4, 5: bibliothecarius qui codices servat, Gloss. Isid.
Latin > German (Georges)
bibliothēcārius, ī, m. (bibliotheca), der Bibliothekar, M. Caes. b. Fronto ep. ad M. Caes. 4, 5 p. 68, 16 N. u. Gloss. IV, 488, 37. Vgl. Löwe Prodr. p. 72.