龙洞 Save Sign in to save words Traditional (Taiwan): 龍洞 lóngdòng ㄌㄨㄥˊ ㄉㄨㄥˋ cave natural cavern (in limestone) Character by character 龙(lóng)surname Long 洞(dòng)cave Other words read lóngdòng longdong with other tones 隆冬 Often confused with longdong 弄懂 龙趸 A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0