Alveolus: a cell, like that of a honeycomb.
"Explanation of Terms Used in Entomology" by John. B. Smith
The margins of the cleft in the lip are also attached to the alveolus by firm reflections of the mucous membrane.
"Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition." by Alexander Miles
It was compared by the Academicians to a great tooth half extracted from the alveolus, with the upper part of the fangs exposed.
"Principles of Geology" by Charles Lyell
The tooth should be pulled out straight, lest the alveolus be broken.
"Surgical Instruments in Greek and Roman Times" by John Stewart Milne
The same concept of the alveolar structure as the SiECAL, see Section 3, is also employed for ScECAL: a pair of sensor layers on either side of a tungsten absorber plate is inserted into an alveolus, where each sensor layer is read out via a printed circuit board (PCB).
Calorimetry for Lepton Collider Experiments - CALICE results and activities