Noun arcanum has 1 sense
  1. secret, arcanum - information known only to a special group; "the secret of Cajun cooking"
    --1 is a kind of information, info
    --1 has particulars:
     esoterica; cabala, cabbala, cabbalah, kabala, kabbala, kabbalah, qabala, qabalah; password, watchword, word, parole, countersign
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