Category:Alveolus

Al*ve"o*lus, n.; pl. Alveoli. Etym: [L., a small hollow or cavity, dim. of alveus: cf. F. alvéole. See Alveary.]

1. A cell in a honeycomb.

2. (Zoöl.)

Defn: A small cavity in a coral, shell, or fossil

3. (Anat.)

Defn: A small depression, sac, or vesicle, as the socket of a tooth, the air cells of the lungs, the ultimate saccules of glands, etc.