溶洞 [－－]

Jyutping jung4 dung6
Pinyin róng dòng

Definitions (CC-CEDICT)
  1. (geology) solutional cave (typically, a limestone cave)
Definitions (粵典–words.hk)
  1. 名詞
    石灰岩​畀​流水​或者​地下水​溶蝕​而​形成​嘅​天然​洞穴
    solutional cave; solution cave
Definitions (Wiktionary)
  1. noun
    Karst cave
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）