ETYM Latin, a small hollow or cavity, dim. of alveus: cf. French alvéole. Related to Alveary.
One of the many thousands of tiny air sacs in the lungs in which exchange of oxygen and carbon dioxide takes place between air and the bloodstream.
(Irregular plural: alveoli).
A tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways; SYN. air sac, air cell.
(pl. -li) Anatomy, small cavity; tooth socket; aircell, etc.; Phonetics, upper front tooth ridge.