Search the dictionary A Chinese word or character, or English Draw a character Search 7 entries. tūmiàn 凸面 convex surface tūmiànjìng 凸面镜 convex mirror tūmiànjìng 凸面鏡 convex mirror tūmiàntǐ 凸面体 convex body shuāngtūmiàn 双凸面 convex on both sides (of lens) tūmiàntǐ 凸面體 convex body shuāngtūmiàn 雙凸面 convex on both sides (of lens)