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Jyutping mak6 mun4 dung1
Pinyin mài mén dōng

Definitions (Wiktionary)
  1. noun
    the root of the dwarf lilyturf (Ophiopogon japonicus) (an herb used in traditional Chinese medicine to treat "yin" deficiency)

麥門冬 [麦门-]

Jyutping
Pinyin mài mén dōng

Definitions (CC-CEDICT)
  1. dwarf lilyturf (Ophiopogon japonicus), its tuber used in TCM