Definition of bronchiole in English:

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Pronunciation: /ˈbräNGkēˌōl/


Any of the minute branches into which a bronchus divides.
Example sentences
  • Isoprenaline exerts its effects by relaxing the smooth muscle tissues lining the finely branched tubular network of bronchioles that surround the lungs.
  • The BO was manifested as branching tongues of myxoid fibrous tissue in respiratory bronchioles and alveolar ducts.
  • Not to be confused with bronchitis, bronchiolitis (pronounced: brahn-kee-oh-lie-tus) is an inflammation of the bronchioles, the smallest branches of the bronchial tree.



Pronunciation: /ˌbräNGkēˈōlər/
Example sentences
  • Weak immunoreactivity for NOS2 in the normoxia plus saline group was present in bronchiolar and vascular smooth muscle, bronchiolar epithelium, and Clara cells.
  • Ecsod can be detected in the arterial intima, media, bronchiolar epithelium, alveolar epithelium, and extracellular matrix of human neonatal lung.
  • There is mucous metaplasia, enlargement of the mass of bronchiolar smooth muscle, and loss of alveolar attachments.


Mid 19th century: from modern Latin bronchiolus, bronchiolum, diminutives of late Latin bronchia, denoting the branches of the main bronchi.

For editors and proofreaders

Syllabification: bron·chi·ole

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