noun (plural alveoli /-ˌlī/)chiefly Anatomy
- 1A small cavity, pit, or hollow, in particular.More example sentences
- Recent studies have shown that it may have a critical role in lung growth, affecting new formation of both alveoli and pulmonary blood vessels.
- The main wall of the duct between alveoli contains smooth muscle.
- We did not find differences in the content of elastic fibers in the distal alveoli between patients with asthma and control subjects.
- 1.1Any of the many tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place.More example sentences
- Scientists also suspect that air pollutants might dampen the growth of alveoli, tiny air sacs in the lungs.
- Holes in the lungs occur as the alveoli air sacs break down.
- As altitude increases above sea level, atmospheric pressure drops with a parallel decrease in the amount of oxygen available at the blood/air interface in the lung alveolus.
- 1.2The bony socket for the root of a tooth.More example sentences
- No preserved teeth or alveoli can be observed in the premaxilla and dentary bones.
- The tooth row is present throughout the entire preserved length of the jaw and possesses 16 teeth and empty alveoli.
- Only a few, fragmentary teeth are preserved, and judging by the fragments and the size of alveoli, the teeth were gracile.
- 1.3An acinus in a gland.More example sentences
- Carbon dioxide in the lungs is 4.5 to 6%, in the blood of alveolus 6.5% and in cells 7%.
- More example sentences
- The Siddall group addressed the molecular phylogeny of three, very similar, alveolate genera.
- Several workers have suggested that the entire alveolate clade is derived from a photosynthetic ancestor.
- One of them corresponded to an alveolate sequence belonging to the recently described marine.
Pronunciation: /-lit, -ˌlāt/adjective
late 17th century: from Latin, 'small cavity', diminutive of alveus.
More definitions of alveolusDefinition of alveolus in:
- The British & World English dictionary