Of, relating to, or constituting the old Slavic alphabet ascribed to Saint Cyril, at present used in modified form for Russian, Bulgarian, certain other Slavic languages, and other languages of the Soviet Union.

• 西里尔字母的旧斯拉夫语字母被归功于圣西里尔的，现在改造的形式用于俄语、保加利亚语、某些其他斯拉夫语和其他苏联语的，或与其有关的，或由其组成的