Black-letter

1. a. Of or pertaining to the days in the calendar not marked with red letters as saints’ days. Hence: Unlucky; inauspicious.
2. a. Written or printed in black letter; as, a black-letter manuscript or book.
3. a. Given to the study of books in black letter; that is, of old books; out of date.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.