Alveolus /(ăl*vē"ō̇*lŭs)/

Al·ve·o·lus

Alveolus

n.

pl. Alveoli ((-lī))

  1. A cell in a honeycomb.
  2. A small cavity in a coral, shell, or fossil (Zool.)
  3. A small depression, sac, or vesicle, as the socket of a tooth, the air cells of the lungs, the ultimate saccules of glands, etc. (Anat.)