#alveolus

• Alveolus — An alternative masculine form, rarely used in current Romanian, for the feminine noun 'alveolă'; a small natural cavity, structural hollow, or cell formed in an organ, organism, or material. It appears sporadically in older medical literature or technical translations where the masculine gender from the Latin etymon 'alveolus' was preserved.
• Alveolus — A small cavity or natural hollow located within an animal or plant organ or tissue. In pulmonary anatomy, it represents the microscopic terminal sac of the airways where gas exchange occurs; in dentistry, it denotes the socket in the jawbones where the tooth root is anchored. By extension, in technology, it defines each of the cells in a package or an alveolar material.