Definition of "Rubric" :

noun: category name

"It is usually discussed under the rubric of functional obesity'."

noun: a title or heading that is printed in red or in a special type

noun: a heading that names a statute or legislative bill; may give a brief summary of the matters it deals with

noun: an authoritative rule of conduct or procedure

noun: directions for the conduct of Christian church services (often printed in red in a prayer book)

noun: an explanation or definition of an obscure word in a text

verb: adorn with ruby red color