A variant or archaic form of bibliothecarian; a librarian or library keeper.
From Latin bibliothecarius with English -y ending (variant form). This older spelling appears in historical texts before bibliothecarian became standard.
The shift from bibliothecary to bibliothecarian shows how English gradually standardized professional titles—earlier versions sound more exotic, reflecting when librarians were rarer and more mysterious.
Complete word intelligence in one call. Free tier — 50 lookups/day.