Alveolus

Alveolus (pl. alveoli, adj. alveolar) is a general anatomical term for a concave cavity or pit.

Uses in anatomy and zoology

 * Pulmonary alveolus, an air sac in the lungs
 * Alveolar cell or pneumocyte
 * Alveolar duct
 * Alveolar macrophage
 * Mammary alveolus, a milk sac in the mammary glands
 * Alveolar gland
 * Dental alveolus, also known as "tooth socket", a socket in the jaw that holds the roots of teeth
 * Alveolar ridge, the jaw structure that contains the dental alveoli
 * Alveolar canals
 * Alveolar process
 * Arteries:
 * Superior alveolar artery (disambiguation)
 * Anterior superior alveolar arteries
 * Posterior superior alveolar artery
 * Inferior alveolar artery
 * Nerves:
 * Anterior superior alveolar nerve
 * Middle superior alveolar nerve
 * Inferior alveolar nerve

Uses in botany, microbiology and related disciplines

 * Surface cavities or pits, such as on the stem of Myrmecodia species
 * Pits on honeycombed surfaces such as receptacles of many angiosperms
 * Pits on the fruiting bodies of fungi such as Boletus or the ascocarps of fungi such as typical ascomycetes
 * Pits on the valves of the tests of many diatoms
 * Membrane supporting vesicles of the alveolates

Uses in linguistics

 * Alveolar consonant, a linguistic vocalization depending upon touching tongue to alveolar ridge
 * Alveolar stop