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Jyutping jyu4 tou5 baak6
Pinyin yú dù bái

Definitions (CC-CEDICT)
  1. fish-belly white (used to describe the dingy light of the dawn sky)
Definitions (Wiktionary)
  1. noun
    whitish color of a fish's belly (often used to describe the sky's colour during daybreak)
    (syn.) 港靠, 魚白, 鱼白
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)