noun
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the aromatic rhizome of a variety in ginger (family: Zingiberaceae).
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the plant Piper chaba ( = P. officinarum) of Piperaceae family.
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the plant Curcuma zeodarina ( = momum zerumbet) of Zingiberaceae family.
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the plant Acorus calamus of Araceae family.
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its root, used for medicinal purposes.