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Jyutping hak1 maau5 daan1 gu1
Pinyin hēi mǔ dān gū

Definitions (Wiktionary)
  1. noun
    oyster mushroom
    (syn.) 平菇, 糙皮側耳, 蠔菇, 秀珍菇, 糙皮侧耳, 侧耳, 側耳, 蚝菇