scholium

n.; pl. L. Scholia E. Scholiums [ NL., fr. Gr. &unr_;, fr. &unr_;. See School. ] 1. A marginal annotation; an explanatory remark or comment; specifically, an explanatory comment on the text of a classic author by an early grammarian. [ 1913 Webster ]

2. A remark or observation subjoined to a demonstration or a train of reasoning. [ 1913 Webster ]