noun
Rare, formal term for explanatory notes or commentary, similar to 注釈 (ちゅうしゃく). Mostly found in academic or literary contexts.
See also: 注釈
この古典の疏注は非常に詳しい。
The commentary on this classic text is very detailed.
注釈 is the common, modern word for notes or commentary. 疏注 is a rare, formal synonym.
Compound of 疏 (そ, 'sparse' or 'commentary') and 注 (ちゅう, 'annotation'). The exact historical derivation is uncertain; the spelling is conventionally associated with explanatory notes.