n.
Pronunciation: ˌ fe-n ə - ' str ā -sh ə n
Function: noun
Date: 1846
1 : the arrangement, proportioning, and design of windows and doors in a building
2 : an opening in a surface (as a wall or membrane)
3 : the operation of cutting an opening in the bony labyrinth between the inner ear and tympanum to replace natural fenestrae that are not functional