hexagonal       
adjective uk/hekˈsæɡ.ən.əl/ us/hekˈsæɡ.ən.əl/
 六边形的,六角形的
having a shape with six straight sides
  a hexagonal building/object 六角大楼/六边体 
 The panels consist of 55 small hexagonal tiles. 面板由 55 块六角形小瓷砖组成。 
 See: hexagon
 - More examples
- The elegant stone building has an unusual hexagonal chimney.
- Larger screws tend to have square or hexagonal bolt heads.
- The hexagonal shaped pencil was developed as an alternative to the round pencil so it would not roll off the desk.