a small branch of a bronchus.
Origin of bronchiole
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
any of the smallest bronchial tubes, usually ending in alveoli
Word Origin for bronchiole
C19: from New Latin bronchiolum, diminutive of Late Latin bronchium, singular of bronchia
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Modern Latin, from diminutive of bronchia "the bronchial tubes" (plural; see bronchial).
Online Etymology Dictionary, © 2010 Douglas Harper
Any of the fine, thin-walled, tubular extensions of a bronchus.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Any of the small, thin-walled tubes that branch from a bronchus and end in the alveolar sacs of the lung.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.