kanji read twice in kanbun; double-reading character
Technical term in kanbun (classical Chinese read in Japanese). Refers to a single kanji that is read twice with different pronunciations in the Japanese rendering of a Chinese sentence, such as 将 read as まさに...んとす.
In kanbun class, I learned that the double-reading character 将 is read as まさに...んとす.
再読文字 is a specific phenomenon within 漢文 (classical Chinese texts read in Japanese), not a synonym.
返り点 are marks indicating reading order in kanbun, while 再読文字 are characters that are read twice.
Compound of 再読 (さいどく, 'reading again') and 文字 (もじ, 'character'). The term describes a kanji that is read twice in the Japanese reading of Chinese texts.