nounWord forms: plural alˈveoˌli (ælˈviəˌlaɪ
; alvēˈəlīˌ; ælˈviəˌli
1. Anatomy and Zoology
a small cavity or hollow
, as a cell of a honeycomb, air cell of a lung, tooth socket, etc.
Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by
Houghton Mifflin Harcourt. All rights reserved.
Word origin of 'alveolus'L, dim. of alveus, a hollow, cavity < alvus, the belly, womb < IE base *au-lo-s > Gr aulos, flute, Lith aulỹs, beehive