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Jyutping au3 tau3 geng3
Pinyin āo tòu jìng

Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)

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Jyutping nap1 tau3 geng3
Pinyin āo tòu jìng

Definitions (CC-CEDICT)
  1. concave lens
Definitions (粵典–words.hk)
  1. 名詞
    將光線​分散​嘅​透​鏡​(​量​詞​:​塊​)
    concave lens; diverging lens
    • 近視眼鏡係用凹透鏡嘅。
      近视眼镜系用凹透镜嘅。
      gan6 si6 ngaan5 geng3 hai6 jung6 nap1 tau3 geng3 ge3.
      The glasses for short-sighted people is made of concave lens.
  2. 反義詞
    凸透鏡
Definitions (Wiktionary)
  1. noun
    concave lens
Examples (粵典–words.hk)
  1. Cantonese
    近视眼镜系用凹透镜嘅。
    近視眼鏡係用凹透鏡嘅。
    gan6 si6 ngaan5 geng3 hai6 jung6 nap1 tau3 geng3 ge3.
    • The glasses for short-sighted people is made of concave lens.
Examples (Wiktionary)
  1. Mandarin
    凹透镜
    凹透鏡
    āo tòu jìng
    • concave lens