1. a small opening or window-like structure in anatomy, especially in bone or other tissue
Usage: medical; anatomical
2. a window or opening in a wall
Usage: architectural; formal

Examples

• The fenestra ovalis is an important structure in the middle ear.
• The surgeon carefully examined the fenestra in the temporal bone.
• Ancient Roman buildings often featured decorative fenestrae.
• The fenestra rotunda allows sound waves to be transmitted in the inner ear.
• The architect designed large fenestrae to maximize natural light.
• Medical students learn about various fenestrae in human anatomy.