Noun sweet calamus has 1 sense
  1. sweet flag, calamus, sweet calamus, myrtle flag, flagroot, Acorus calamus - perennial marsh plant having swordlike leaves and aromatic roots
    --1 is a kind of marsh plant, bog plant, swamp plant
    --1 is a member of Acorus, genus Acorus
    --1 has parts: calamus
    --1 has substances: calamus oil
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