Alveolus

Webster's Dictionary of the English Language

·noun A cell in a honeycomb.

II. Alveolus ·noun A small cavity in a coral, shell, or fossil.

III. Alveolus ·noun A small depression, sac, or vesicle, as the socket of a tooth, the air cells of the lungs, the ultimate saccules of glands, ·etc.

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