捨て仮名
す
て
が
な
Meanings
1
small okurigana used with kanbun
Historical term for small-sized kana used to indicate Japanese readings in kanbun (classical Chinese texts). Not used in modern standard Japanese writing.
In the Japanese reading of kanbun, small okurigana were used to indicate the reading.
2
small kana for diphthongs; small kana for yōon
In modern usage, refers to small kana like ゃ, ゅ, ょ used to form contracted sounds (yōon) or other small kana such as ぁ, ぃ, ぅ, ぇ, ぉ. The term is somewhat technical; learners more often encounter 小書き文字 or simply 小さい「ゃ」etc.
The small 'ゃ' in 'きゃ' is a type of small kana.