- a little cavity, pit, or cell, as a cell of a honeycomb.
- an air cell of the lungs, formed by the terminal dilation of tiny air passageways.
- one of the terminal secretory units of a racemose gland.
- the socket within the jawbone in which the root or roots of a tooth are set.
Origin of alveolus
Examples from the Web for alveoli
The pores or alveoli are angular elongated, white at first, then straw-color.The Mushroom, Edible and Otherwise
M. E. Hard
The state of the alveoli and the teeth, shows that the molars had not yet pierced the gum.On Some Fossil Remains of Man
Thomas H. Huxley
Pertaining to the alveoli, the cavities for the reception of the teeth.A Practical Physiology
Albert F. Blaisdell
Its alveoli in one maxilla are closed and those in the opposite maxilla are more open than is normal.The Recent Mammals of Tamaulipas, Mexico
Owing to the absence of superior incisors in ruminants, the intermaxillary bone presents no alveoli.Artistic Anatomy of Animals
- any small pit, cavity, or saclike dilation, such as a honeycomb cell
- any of the sockets in which the roots of the teeth are embedded
- any of the tiny air sacs in the lungs at the end of the bronchioles, through which oxygen is taken into the blood
Word Origin and History for alveoli
1706, from Latin alveolus "a tray, trough, basin; bed of a small river," diminutive of alvus "belly, stomach, paunch, bowels; hold of a ship," from PIE *aulo- "hole, cavity" (cf. Greek aulos "tube, pipe," Old Church Slavonic uliji, Lithuanian aulys "beehive" (hollow trunk), Armenian yli "pregnant").
- A small angular cavity or pit, such as a tooth socket or an air sac.
- Any of the tiny air-filled sacs arranged in clusters in the lungs, in which the exchange of oxygen and carbon dioxide takes place. Also called air sac