'Catholicon' may refer to one of the following:
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Catholicon (building), the primary church in an Orthodox or Eastern Catholic
monastery
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Catholicon (religious dictionary), written in 1286 by Johannes Januensis de Balbis (''Summa grammaticalis quae vocatur Catholicon'')
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Catholicon (Mor Yakub), part of the Holy Liturgy of
Mor Yakub of the Syriac Orthodox Church
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Catholicon (Breton dictionary), Breton-Latin-French dictionary written in 1464 by Jehan Lagadeuc and printed in 1499
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Catholicon (electuary), an alleged all-purpose cure used in pre-modern medicine
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Catholicon (band), death metal band from Baton Rouge, LA