Jisho

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(文字)
Wikipedia definition
1. Koppa (Cyrillic)Early Cyrillic numeral character Koppa (=90) Koppa is an archaic letter-like numeral character of the Cyrillic script. Its form (and modern name) are derived from the Greek letter Koppa (Ϙ ϙ). Koppa was used as a numeral character in oldest Cyrillic manuscripts, representing value 90 (exactly as its Greek origin did). It was replaced relatively early by the Cyrillic letter Che (Ч ч), which is similar in appearance and originally had no numeric value.
Read “Koppa (Cyrillic)” on English Wikipedia
Read “コッパ (キリル文字)” on Japanese Wikipedia
Read “Koppa (Cyrillic)” on DBpedia

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