Fenestration

Fenestration or fenestrate may refer to:


 * Fenestration (architecture), relating to openings in a building
 * Fenestra, in anatomy, medicine, and biology, any small opening in an anatomical structure
 * Leaf window, or fenestration, a translucent or transparent area in a plant leaf
 * Perforate leaf, sometimes described as fenestrate, a leaf that develops large holes as it grows
 * Fenestration, holes in the rudders of some ships, supposedly giving greater control