scholium

noun, plural scho·li·a [skoh-lee-uh] /ˈskoʊ li ə/.

1. Often scholia.
   1. an explanatory note or comment.
   2. an ancient annotation upon a passage in a Greek or Latin text.
2. a note added to illustrate or amplify, as in a mathematical work.

noun plural -lia (-lɪə)

1. a commentary or annotation, esp on a classical text