rubric (n.)youdaoicibaDictYouDict[rubric 词源字典]
c. 1300, "directions in religious services" (often in red writing), from Old French rubrique, rubriche "rubric, title" (13c.), from Latin rubrica "red ochre, red coloring matter," from ruber, from PIE root *rudhro- (see red). Meaning "title or heading of a book" is from early 15c. Related: Rubrical.[rubric etymology, rubric origin, 英语词源]