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Jyutping cau3 kau4
Pinyin chòu qiú

Definitions (Wiktionary)
  1. noun, Jin, Mandarin, dialectal
    camphor ball; mothball
    (syn.) 衛生球, 衛生丸, 臭球子, 臭蛋兒, 衛生丸子, 臭蛋, 臭球, 臭球兒, 樟腦丸, 衛生球兒, 臭球丸兒, 必毒丹, 樟腦球兒, 樟腦球, 樟腦丸子, 衛生丸兒, 臭丸