[ brong-kee-ohl ]
/ ˈbrɒŋ kiˌoʊl /

noun Anatomy.

a small branch of a bronchus.

Origin of bronchiole

1865–70; < New Latin bronchiolum, equivalent to bronchi(a) bronchia + -olum -ole1

Related forms

bron·chi·o·lar [brong-kee-oh-ler, brong-kahy-uh-] /ˌbrɒŋ kiˈoʊ lər, brɒŋˈkaɪ ə-/, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for bronchiole


/ (ˈbrɒŋkɪˌəʊl) /


any of the smallest bronchial tubes, usually ending in alveoli

Derived Forms

bronchiolar (ˌbrɒŋkɪˈəʊlə), adjective

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

Medicine definitions for bronchiole


[ brŏngkē-ōl′ ]


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.

Science definitions for bronchiole


[ brŏngkē-ōl′ ]

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.