Rubric

Part of speech: noun (n.)

1. That part of any work in the early manuscripts and typography which was colored red, to distinguish it from other portions. Hence, specifically:

2. A titlepage, or part of it, especially that giving the date and place of printing; also, the initial letters, etc., when printed in red.

3. Hence, that which is established or settled, as by authority; a thing definitely settled or fixed. Cowper. Nay, as a duty, it had no place or rubric in human conceptions before Christianity. De Quincey.

Part of speech: verb (v.)

To adorn ith red; to redden; to rubricate. [R.] Johnson.