凹凸性 Save Sign in to save words āotūxìng ㄠ ㄊㄨ ㄒㄧㄥˋ concavity math. Character by character 凹(āo)concave 凸(tū)stick out 性(xìng)nature Other words read āotūxìng aotuxing with other tones 凹凸形 A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0