scholium

1. (linguistics) A note added to a text as an explanation, criticism or commentary.Examples: "And when I shulde make scholias, notis, and gloses in the margent as himself and his master doith."; "Mr. Fox was fain to make soom Scholia’s on it, to reconcile a gloss like that of Orleance, which corrupts the Text."; "Almost every word admits a scholium, and a long one too."

2. (mathematics) A note added to a proof as amplification.Examples: "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."; "Which is evident likewise concerning the Orbits of Mars, Jupiter and Saturn, from the Scholium to Prop. 9."; "Some…cast all their…metaphysical and…moral learning into the method of mathematicians, and bring every thing relating to those abstracted or those practical sciences under theorems, problems, postulates, scholiums, corollaries, &c."