Definitions

1. noun

A window, especially in ancient or medieval buildings.

“The architect designed a fenestra in the north wall of the castle to allow natural light inside.”

2. noun

A type of fossilized shell, typically of an extinct brachiopod.

“The paleontologist discovered a fenestra in the rock formation, which was later identified as a fossil.”

3. noun

A window or opening in the shell of a brachiopod.

“The fenestra in the brachiopod’s shell allowed it to filter small particles from the water.”

4. noun

A structural opening or window in the shell of an insect, especially a butterfly or moth.

“The butterfly’s fenestra allowed it to see its surroundings and navigate through the forest.”

5. noun

A type of window or opening in a structure, especially a medieval one.

“The medieval castle’s fenestra provided a view of the surrounding countryside.”