| alveolar yoke | One of the eminences on the outer surface of the alveolar process of the maxilla or mandible, formed by the roots of the incisor teeth. Synonym: alveolar yoke. (05 Mar 2000) |
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| alveolar-arterial oxygen difference | The difference or gradient between the partial pressure of oxygen in the alveolar spaces and the arterial blood: P(A-a)02. Normally in young adults this value is less than 20 mm Hg. See: alveolar gas equation. (05 Mar 2000) |
| alveolate | Pitted or honeycombed on the surface. (09 Oct 1997) |
| alveolectomy | Subtotal or complete excision of the alveolar process of the maxilla or mandible. (12 Dec 1998) |
| alveoli | A small cell containing air in the lungs, a sac-like dilation of the alveolar ducts in the lung (plural: alveoli) (27 Sep 1997) |
| alveoli pulmonis | One of the thin-walled saclike terminal dilations of the respiratory bronchioles, alveolar ducts, and alveolar sacs across which gas exchange occurs between alveolar air and the pulmonary capillaries. Synonym: alveoli pulmonis, alveolus, air cells, air vesicles, bronchic cells. (05 Mar 2000) |
| alveolingual | Relating to the lingual (inner) surface of the alveolar process of the lower jaw. Synonym: alveolingual. (05 Mar 2000) |
| alveolitis | <pathology> Inflammation of an alveolus. Synonym: odontobothritis. (18 Nov 1997) |
| alveolitis, extrinsic allergic | Conditions in which inhalation of organic dusts results in hypersensitivity reactions at the alveolar level, associated with the production of precipitins. (12 Dec 1998) |
| alveolo- | An alveolus, the alveolar process; alveolar. Origin: L. Alveolus, a concave vessel, a bowl, a basin, fr. Alveus, a trough, + -olus, small, little; akin to alvus, the belly, the womb (05 Mar 2000) |
| alveolobuccal groove | The upper and lower half of the buccal vestibule on each side. Synonym: alveolobuccal sulcus, gingivobuccal groove, gingivobuccal sulcus. (05 Mar 2000) |
| alveolobuccal sulcus | The upper and lower half of the buccal vestibule on each side. Synonym: alveolobuccal sulcus, gingivobuccal groove, gingivobuccal sulcus. (05 Mar 2000) |
| alveolocapillary block | The presence of material that impairs the diffusion of gases between the air in the alveolar spaces and the blood in alveolar capillaries; block can be caused by oedema, cellular infiltration, fibrosis, or tumour, and results in undersaturation of peripheral arterial blood with oxygen. (05 Mar 2000) |
| alveolocapillary membrane | The pulmonary diffusion barrier. (05 Mar 2000) |
| alveoloclasia | Destruction of the alveolus. Origin: alveolo-+ G. Klasis, breaking (05 Mar 2000) |