Definition of alveolus

• n. - A cell in a honeycomb.
• n. - A small cavity in a coral, shell, or fossil
• n. - A small depression, sac, or vesicle, as the socket of a tooth, the air cells of the lungs, the ultimate saccules of glands, etc.
• n. - A cell in a honeycomb.
• n. - A small cavity in a coral, shell, or fossil
• n. - A small depression, sac, or vesicle, as the socket of a tooth, the air cells of the lungs, the ultimate saccules of glands, etc.