"Ru-Ru dictionary" in Russian - "
Толковый словарь русского языка". The most famous authors - Ожегов, Ушаков, Дмитриев. Also there are encyclopedic dictionaries - "Большая советская энциклопедия", "Советский энциклопедический словарь", "Российский энциклопедический словарь". Try to search these items with
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