also: おことてん
noun
diacritical marks for reading classical Chinese
A system of marks added to Chinese texts to indicate Japanese word order and grammatical endings, used in the traditional reading of kanbun. The term is technical and primarily encountered in historical or linguistic contexts.
漢文の教科書にはヲコト点が振ってある。
The classical Chinese textbook has ヲコト点 marks added.
Rare kanji spelling; the reading おことてん is itself rare.
The name comes from the use of the characters ヲ (wo) and コト (koto) as representative marks in the system. The exact historical derivation is uncertain, but the term is well-established in the study of kanbun.