蝶竇 Save Sign in to save words Simplified: 蝶窦 diédòu ㄉㄧㄝˊ ㄉㄡˋ sphenoidal sinus Character by character 蝶(dié)butterfly 竇(dòu)surname Dou A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0