rubric

noun

1.
an authoritative rule of conduct or procedure
2.
an explanation or definition of an obscure word in a text
gloss
3.
directions for the conduct of Christian church services (often printed in red in a prayer book)
Derived from:
rubricate
4.
a heading that names a statute or legislative bill; may give a brief summary of the matters it deals with
statute title title
5.
a title or heading that is printed in red or in a special type
6.
category name