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alveolus(ălvē`ələs): see lungslungs,
elastic organs used for breathing in vertebrate animals, excluding most fish, which use gills, and a few amphibian species that respire through the skin. The word is sometimes applied to the respiratory apparatus of lower animals.
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The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/
A tiny air sac of the lung.
A tooth socket.
A sac of a compound gland.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
1. any small pit, cavity, or saclike dilation, such as a honeycomb cell
2. any of the sockets in which the roots of the teeth are embedded
3. any of the tiny air sacs in the lungs at the end of the bronchioles, through which oxygen is taken into the blood
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005