2 Old HSK word(s): 
☊凸 ** D ☊阳 ** D
Definitions from Unihan Copyright © 1991-2015 Unicode® Inc. All rights reserved.
阳 'male' principle / light / sun
Hsk Characters:
HSK -Characters and beyond:
| Gb | Big5 | Eng | Rad | Mega | Triple | Multilingual |
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Ausbuchtung (S)konvex (Adj) [tu1 mian4] 
凸面
Ausbuchtung (S)konvex (Adj) [tu2 zhuang4] 凸状
konvex [wai4 tu1] 外凸
konvexe Hülle (S, Math) [tu1 bao1] 凸包
konvexe Menge (S, Math) [tu1 ji2] 凸集
Konvexe und konkave Funktionen (Math) [tu1 han2 shu4] 凸函数
Konvexlinse (S)Sammellinse (S) [tu2 tou4 jing4] 凸透镜
Konvexlinse (S, Tech) [tu1 jing4 ti3] 凸镜体
