scholium

noun3

1. •
   A note added to a text as an explanation, criticism or commentary.

   • And when I shulde make scholias, notis, and gloses in the margent as himself and his master doith. — 1535
2. •
   A note added to a proof as amplification.

   • Scholium, is a remark made leisurely, and as it were by the by, on that Proposition, Subject or Discourse before advanced, treated of, or delivered. — 1704
3. •
   A “copy-book maxim”, trite saying.

   • The old scholium, that ‘too much familiarity breeds contempt’. — 1830