mullion

美 [ˈmʌljən]
英 ['mʌljən]
  • n.(窗扇间的)中竖框
  • 网络直棂;窗门的竖框;竖棂
复数:mullions  
mullion
n.
1.
(窗扇间的)中竖框a solid vertical piece of stone, wood or metal between two parts of a window