Definitions

1. noun

A small cavity or pit in a surface, especially one in the surface of a bone, tooth, or leaf.

“The alveolae in the leaf allow for efficient gas exchange.”

2. noun

A small air cell or sac, especially one in the lungs or a spongy tissue.

“The alveolae in the lungs are where oxygen is absorbed into the blood.”

3. noun

A small pit or depression in a bone, especially one that contains a nerve or blood vessel.

“The alveolae in the bone provide a path for nerve impulses to travel.”