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Jyutping ling1 ding1 joeng4
Pinyin líng dīng yáng

Definitions (Wiktionary)
  1. name
    Lingdingyang (part of the Pearl River estuary which runs from Humen to Jiuzhouyang)

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Jyutping ling4 ding1 joeng4
Pinyin líng dīng yáng

Definitions (粵典–words.hk)
  1. 名詞、專名
    水域​名​;​中國​廣東​珠江口​之外​,​介乎​新界​西北​同​珠海​之​間​嘅​海面
    The Lingding Channel, the sea in the south of the exit of the Pearl River, between the north-west New Territories of Hong Kong and Zhuhai of Mainland China
  2. 參看
    零丁洋