scholium

noun

scho·​li·​um ˈskō-lē-əm 

plural scholia ˈskō-lē-ə  or scholiums

1

: a marginal annotation or comment (as on the text of a classic by an early grammarian)

2

: a remark or observation subjoined but not essential to a demonstration or a train of reasoning

Word History

Etymology

New Latin, from Greek scholion comment, scholium, from diminutive of scholē lecture

First Known Use

1535, in the meaning defined at sense 1