ˈsəb+ˌ- noun
Etymology: sub- + frame
: a secondary frame: as
a. : a frame for the attachment and support of a finish frame (as of a window or door)
b. : a frame for the support of panels used as a wall finish
ˈsəb+ˌ- noun
Etymology: sub- + frame
: a secondary frame: as
a. : a frame for the attachment and support of a finish frame (as of a window or door)
b. : a frame for the support of panels used as a wall finish
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012