pneumocyte


al·ve·o·lar cell

any of the cells lining the alveoli of the lung, including the squamous alveolar cells, the great alveolar cells, and the alveolar macrophages. Synonym(s): pneumocyte

pneumocyte

(nū′mō-sīt) Either of the two types of cells that form the alveoli of the lung. Type I cells are simple squamous epithelium that permit gas exchange. Type II cells are rounded and produce surfactant.