noun
irregular reading; non-standard reading
Technical term used in kanji studies and linguistics. Refers to a reading of a kanji that differs from the expected or standard on'yomi/kun'yomi, such as 熟字訓 or special historical readings.
「明日」を「あした」と読むのは別音の一種です。
Reading 明日 as あした is a type of irregular reading.
この漢字には通常の音読みとは異なる別音が存在する。
This kanji has an irregular reading that differs from the usual on'yomi.
熟字訓 is a specific type of irregular reading where a compound is read as a whole with a native Japanese word, often considered a subset of 別音.
Compound of 別 (different, separate) and 音 (sound, reading). The term is used in Japanese linguistics to describe kanji readings that do not follow standard patterns.