Main Entry: mar·gi·na·lia

Pronunciation: \ˌmär-jə-ˈnā-lē-ə\

Function: noun plural

Etymology: New Latin, from Medieval Latin, neuter plural of marginalis

Date: 1832

1 : marginal notes or embellishments (as in a book)
2 : nonessential items <the meat and marginalia of American politics — Saturday Review>